Pharmjoe Tutor 📚 (OAU campus) Live class Stability of Alkene, Naming cyclic compound

追加: 2026-05-08

[00:00:00]your name. That's your attendance for today. So, let's continue. We have 59 students on the group and we are more than this. I don't know why that is happening.

[00:00:13]We have 50 65 Okay. So, let's continue. So, today before going to Before going to the assignment I gave you, I want us to briefly look at something that I've not paid attention to in the last in the last classes I've been having with you guys.

[00:00:38]And that is I told you that we have what we call We have what we call aliphatic and aromatic. An aliphatic can be cyclic or acyclic.

[00:00:52]Aliphatic can be cyclic or acyclic. So, meaning that we have cyclic compounds.

[00:00:58]We have cyclic compounds.

[00:01:02]We have cyclic compounds. So, I'm going to be look showing you some cyclic compounds.

[00:01:09]We have some cyclic compounds.

[00:01:13]And the reason why I need to focus on these cyclic compounds is because some of you don't know how to name if it has to do with cyclic structure.

[00:01:23]If it has to do with cyclic structure.

[00:01:25]And that is why I'm doing my best explaining it to you. For example, the compound is written this way.

[00:01:34]Look at this compound very well.

[00:01:36]Let's imagine that this compound is written this way and you have to name this. Now, very simple. This is you count the number of carbons. You believe that the number of carbons are every joint on this shape, right? So, this is carbon we have carbon, we have carbon, we have carbon, carbon, we have carbon and we have carbon here. Now, with what I have on the board, how many carbons can you see there? I can see 1 2 3 4 5 6. You can see six carbons, right? Now, six carbons signifies what? When it's six, it is what? Hex.

[00:02:07]When it's six, it is what? Hexane. But because it's a cyclic, that's why we are saying cyclo.

[00:02:14]So, anytime your structure is a cyclic ring, a ring structure, you use the word what? Cyclo.

[00:02:21]I think that is clear. So, this is cyclo. Now, it depends because looking at this you should be able to determine the number of hydrogen that is present on this compound. For example, we know that this is a carbon.

[00:02:36]Can you see the carbon that is here?

[00:02:37]This is a carbon. This carbon is having hydrogen up here and is having hydrogen down here. Is having hydrogen here, hydrogen here. We have hydrogen, we have hydrogen.

[00:02:47]We have hydrogen, we have hydrogen like that. We have hydrogen like that.

[00:02:53]Now, these are the hydrogens we have here because I taught you line formula, you know that this is one bond, this is one bond.

[00:03:00]Then plus this plus this making a maybe four. That is around that carbon that is there. Is that clear? But this is a ring structure. Because it's a ring structure and all that we can see on this structure is just carbon and hydrogen.

[00:03:13]All that we can see on this ring structure is carbon and hydrogen. Take it to the line.

[00:03:19]So, all we can All that we have here is carbon and hydrogen. So, since it's carbon and hydrogen and they are single bond that are around it, what type of family of the organic compound is this? Alkane. I think So, how many carbons can you count? 1 2 3 4 5 6. How many carbons all together?

[00:03:36]Six. And because it's a six carbon, so what do you say? Because it's six carbon, you say it's hexane. So, I can even say cyclo.

[00:03:46]I can even say cyclo what? Cyclohexane.

[00:03:51]This is cyclohexane.

[00:03:53]Is that clear?

[00:03:55]So, please I want you to Is it on the right like that?

[00:04:00]Now, this is cyclohexane. And how do I name cyclohexane? 1 2 3 4 5 6. So, if you have something like this, let's say we have something like this.

[00:04:13]How many carbons is here?

[00:04:14]Three.

[00:04:15]1 2 3. Is that okay?

[00:04:18]If you have something like this, how many carbons is here? Four.

[00:04:22]1 2 3 4. Four carbons, right?

[00:04:27]Now, I I can put any functional group on them.

[00:04:31]I don't know if you get what I'm trying to say. If you have any question, please ensure that you ask that question. I think it's clear. So, for example, if I have something like this, everybody, have you seen a compound like this?

[00:04:43]I have something like this. Now, look at this compound.

[00:04:46]Now, this compound you know we There's a way we can put hydrogen on them. Do you know that now?

[00:04:53]Now, this is a carbon, this is a carbon, this is another carbon, this carbon and this carbon. They are two.

[00:04:57]And this is also another what? Carbon.

[00:04:59]So, how many carbons do we have in total here? We have six carbons, right?

[00:05:03]Now, I can determine the number of hydrogen that will be here because this is carbon, carbon, carbon, carbon. Now, this carbon now is having one bond and one bond. And I told you that how many bonds can we have around our carbon? How many bonds? Four. So, I I know the number of hydrogen. So, most of the time this is where you see your compound. You don't need to include the hydrogen. The hydrogen is hidden. Is that okay?

[00:05:25]Now, who can tell me how many hydrogens will be on these two guys here?

[00:05:29]How many hydrogens will be here? Who can tell me?

[00:05:32]Oh, yeah. How many hydrogens will be on this carbon? How many hydrogens will be on this carbon?

[00:05:39]I'm waiting for a response. How many hydrogens will be on this carbon and how many hydrogens will be on this carbon?

[00:05:43]There's a carbon here, there's a carbon here. How many hydrogens here?

[00:05:47]One.

[00:05:51]It will be one hydrogen here. And this carbon will also have how many hydrogens?

[00:05:56]But this one will be having what? One plus that's two.

[00:05:59]This two.

[00:06:00]This two.

[00:06:02]This two. Do you all agree with me? Yes.

[00:06:04]Yeah, that's clear. So, So, I think we can continue like that.

[00:06:11]So, if you have a compound Now, if you have Let's go back to this compound. I want us to name this compound now.

[00:06:17]I want us to name this compound.

[00:06:18]Everybody, go back to this compound.

[00:06:20]Let's Let's try to name this compound.

[00:06:22]Now, firstly, what can you see on this compound? You can see carbon all over, right? But there's a functional group inside this. What Who can tell me the functional group that is on this structure?

[00:06:31]What functional group is on this structure?

[00:06:34]Oh, yeah.

[00:06:36]Thank you. Now, the functional group on this structure, the functional group that we have on this structure, I want to know.

[00:06:42]Thank you. Alkene. And why is it alkene?

[00:06:44]It is alkene because of the double bond.

[00:06:46]Can you see the double bond that is there?

[00:06:48]Can you see the double bond?

[00:06:50]There's a double bond here. So, if you are told to name it, how do you name structures like this?

[00:06:55]That's the question. How do you name structures like this? Now, firstly, this is a It is named to be cyclo because it's a ring structure. How many carbons do we have here? We have six carbons. But how do we count it? We count it in such a way that our double bond here, since it's just one double bond that is there.

[00:07:12]Since it's one double bond, you will count in such a way that the double bond will be in position number what? One. Position number what?

[00:07:21]So, meaning I'm going to start saying 1 2 3 4 because I see 3 4. Do you know?

[00:07:26]So, anytime you have something like that because we want to We want to give this double bond a number. Do you know that?

[00:07:31]All these carbons here now, they have We can give them their number. And by giving them their number, we can give this guy his number. Do you get what I'm trying to say?

[00:07:38]So, how do I count in such a way that I will give this double bond a number?

[00:07:42]Because it's a functional group, I will count in such a way that it is having a very small number. So, where do I start my counting from? From either here or what? Here. Anyone. If I do here, that will be what? 1 2 3 4 5 6. Do you get it?

[00:07:57]If I do one, it means that the double bond is in position number what? One. Or if I do one, the double bond is in position number what? One. I get it.

[00:08:04]Either here or here. But the rule is that it should be This must be 1 2. Do you get that that idea? Eh?

[00:08:10]So, what will be the name of this? This is one. So, the double bond is in position number one. So, what do we say?

[00:08:14]Cyclohexane.

[00:08:16]Because it's six carbon, hex. You don't need to say hex-1-ene because the double bond is in position number one. I mean.

[00:08:22]So, what do you then say? Cyclohexene.

[00:08:25]Somebody.

[00:08:27]You should say start cyclohexene.

[00:08:34]So, if you have any question, is there any question around this before I give you another one? Please.

[00:08:40]I will give you another one to try now.

[00:08:42]I want us to try it because I've been seeing questions that have to do with bigger bonds and structures like that.

[00:08:48]Let's say we have something like that.

[00:08:50]Ensure you tap on the like button, please.

[00:08:52]Tap on the like buttons. Now, everybody, let's look at this question.

[00:08:59]Can you see this structure?

[00:09:00]This is not the only ring structure we have. I can give you another one.

[00:09:03]Now, let's imagine we have this here and we have bromine here.

[00:09:07]Can you name this ring structure?

[00:09:20]Now, somebody is asking that how do we count? Do we count anticlockwise or clockwise? I told you that the first thing is that look at this compound.

[00:09:27]That guy that has that question. Look at this compound. This compound, is there a functional group on this compound, everybody?

[00:09:33]Is there a functional group on this compound?

[00:09:35]And where is the functional group on this compound?

[00:09:39]Please, is somebody here? Those who are asking for anticlockwise or clockwise, firstly, attention to what I'm saying.

[00:09:44]Is there a functional group on this compound?

[00:09:48]Now, what is the functional group on that compound?

[00:09:50]I need to know. What functional group is on that compound?

[00:09:53]Yes, it's alkane. Now, and I told you that anytime you want to give them position, anytime you want to start your count because I can make any of these albums my number one. Do you get it? I can make any of these albums my number one. But the rule is that you must ensure that your functional group is having a very small number.

[00:10:10]Do you get that? So your functional group must have a very small number.

[00:10:14]Meaning that this is my functional group. Can everybody see my functional group here?

[00:10:18]I want to start naming because I say this is one, this will be 1 2 3 4. It's giving this guy number four.

[00:10:25]Or I said 1 2 3. It's giving number three. We don't want that. We want to ensure that your functional group is in position number what, everybody? One.

[00:10:33]Is that okay?

[00:10:34]So meaning that this is our functional group which is in number one.

[00:10:39]Yes, our functional group is in number one. So the next session is this. This is my functional group. Can you get I I get it? Now the next session is should I say 1 2 or what?

[00:10:49]Should I go 1 2 3 4 or 1 2 3 4 5? Who will tell Which one will be better?

[00:11:01]No. If I go Look at it again, you know.

[00:11:03]Do you know that I told you that this is our functional group that have the double bond. Can you see the double bond? Yes.

[00:11:09]This is the double bond here. Can you see the double bond? So if this is the double bond, are you getting it? And I said we want to ensure that the double bond is in position number what? One.

[00:11:17]Because it's the power it's the functional group, right? So how then do we go about it?

[00:11:22]I said I should count in such a way that it's having position number one. So I can say I can say that I can start from here and say that 1 2 3 4.

[00:11:32]Or I can start from here and say what? 1 2 3 4 5. So one is 1 2 3 4 and one is 1 2 3 4 5. So if I count like this like this one, this is two, this is three, and this is going to be what? Four. Our bromine is going to be in position number what? Four. So do we want the bromine to be in position number four or do you want the bromine to be in position number five? Which one is accepted? to be in position number what?

[00:11:56]Four. Because in this case our functional group is in position number one. Do you know?

[00:12:01]But you know I can count the other way around. What do What do I mean by counting the other way around? I can say I can say 1 then what? 2 then what? 3 4 5. So which one is better?

[00:12:13]4-bromo or 5-bromo? 4-bromo. 4-bromo. So 4-bromo that will be what? 4-what?

[00:12:20]Bromo.

[00:12:21]Is that okay? Yes. Uh-huh. Then um what's our our naming site? Because it's a ring. I told you anytime it's a ring, what do you say?

[00:12:29]It's cyclo. Because it's a ring, it's a what? Cyclo.

[00:12:33]Are you getting it?

[00:12:34]Uh-huh. 4-bromocyclo Now how many carbon is this ring having, everybody? Six carbon. So 4-bromocyclo what? Hex. Because of this double bond, are we? Our double bond is in position number what, everybody? One.

[00:12:49]Not position number two, position number what? One.

[00:12:52]1 2 Do you get it?

[00:12:54]Yes.

[00:12:55]Or you're looking at this now. Because society can't accept it.

[00:12:58]Do you get it?

[00:12:59]So that will be what?

[00:13:01]You don't need to say hex-1, you just say 4-bromocyclohexene.

[00:13:06]Now so far is there anybody that is having question? I have 119 uh people on this class. Is there anybody having question on this naming a cyclo um compound? I will give you a question to name to draw for me. And I'm expecting everybody to be able to draw that structure.

[00:13:26]Anything [snorts] of this side. Let's Let's name it something else.

[00:13:30]Now anytime you are given a cyclic structure, what you pay attention to is what type of cyclic structure do we have? Because it can be We have different type of cyclic structure. I said it can be This is how many sides?

[00:13:40]This is six sides. We have the four sides. We have the uh what do you call it? Three sides. Is that okay? We have the five sides. But in this case, how many sides do we have? We have got six.

[00:13:50]Is that okay? Now so what do you pay attention to anytime it's a cyclo anytime it's a cyclo? You pay attention to how many sides is it is it is that structure. Is that okay? Then what type of functional group is present on it.

[00:14:02]You give the functional group priority.

[00:14:03]What did I say should be given to the functional group? Priority. So can somebody draw this structure for me?

[00:14:09]Can somebody somebody name this one for me? And maybe let us make it another dimension.

[00:14:26]Hello. Can somebody tell me how many functional group is present on this compound? I'm expecting answer.

[00:14:35]Oh yeah yeah yeah yeah yeah.

[00:14:37]How many functional group do you have in this compound? This compound are you getting it, everybody?

[00:14:41]How many functional group are you seeing there?

[00:14:43]Then how many Let's start with this. How many sides is this ring?

[00:14:47]Five. Five. How many sides? Let's all start the question. How many sides is this ring?

[00:14:52]Five. Let's count. How many sides are there in this cyclic ring?

[00:14:56]That's one, that's two, three, four, five. Five sides. Now how many functional group are we now seeing there?

[00:15:04]How many functional group are you seeing in this one? Two.

[00:15:06]Two.

[00:15:07]Yeah, I think some people Yes, you got it right. We have two functional groups there. Where Where are the functional group? We have this guy.

[00:15:15]This is one functional group, right?

[00:15:17]Then this is another what? Functional group. How many functional group do you have in total like that? Two.

[00:15:24]We have two functional group. And this is how many sides? A five side. And because it's five sides and it is cyclic, you say cyclopent. Are we? Yes.

[00:15:33]Cyclo what? Pent. Cyclopent means it is a ring structure that have how many sides? Five sides. That's why I call it a what? A cyclopent.

[00:15:44]Now the next question is what type of functional groups do we have on it?

[00:15:50]Now I will test your knowledge on functional group. I thought I I I I am very sure I taught you functional groups, right? Now let's start with What are the functional groups on it? We believe it is two. This is one functional group. This is one functional group. Let's start with What are the functional groups on it? Tell me the names of these functional groups. Where are they coming from?

[00:16:11]Oh yeah oh yeah oh yeah oh yeah oh yeah.

[00:16:13]How are you?

[00:16:14]It's been a while. Have you Do you have any classes?

[00:16:19]Now here we have some of our students that is attending the physical class here.

[00:16:24]So in case you want to know, you have some of the students attending physical class. So shout out to the physical students here.

[00:16:32]Now look at the board again. What are the functional groups that is here? We have Somebody is helping me. Who is that person? Dofomi. Dofomi said we have alkanol and alkanone. Please clap for that girl.

[00:16:43]It's not easy.

[00:16:45]It's not easy.

[00:16:46]Yes, we have two functional groups here.

[00:16:48]Where are the functional groups? The functional groups are OH and double bond O. We have OH which is alkanol.

[00:16:56]This guy is coming from alkanol.

[00:16:58]Then this double bond O, where is that Where is this guy coming from? Because some of you don't know.

[00:17:03]Where?

[00:17:04]Eh? I can't find my way. Alkanone. How do you know it's alkanone?

[00:17:08]Because of the This is like saying this is alkanol. Why do I say it's the same thing?

[00:17:13]Is that it? Is that it?

[00:17:15]Do you remember R R? Do you remember?

[00:17:17]Yes. This is functional group of of ketone.

[00:17:20]So who did not know that this is a ketone functional group? If you did not know, let me know.

[00:17:24]Some students Yes, yes, yes, somewhere.

[00:17:25]Thank you so much. And you are Thank you so much. Who else again?

[00:17:30]Uh Ojediran Adedapo.

[00:17:32]Good girl.

[00:17:34]Good girl. Now the next thing is how do we then name it?

[00:17:38]Are we? [snorts] So the next question is we have two functional group here.

[00:17:43]Any questions so far? Okay, I have seen it. We have two functional group here.

[00:17:47]This and this. Who is taking priority?

[00:17:49]Who are Who are we going to give priority? That's the next question.

[00:17:53]Between OH and a ketone, who will have more priority? Ketone.

[00:17:58]OH.

[00:17:59]I think it's the same. Oh yeah oh yeah oh yeah. Were you there when we did our um hour? I've not been seeing you this semester. What's going on?

[00:18:07]I I know that I don't take the class regularly.

[00:18:10]Why?

[00:18:11]When did you start not having Is it? I didn't get it. Late? Okay.

[00:18:16]Okay. Okay.

[00:18:17]Have I seen Have I seen you this semester? Yes.

[00:18:21]You are attending my class? Yes.

[00:18:24]You will come and tell me why you are not really attending class after the class. Is that okay?

[00:18:28]Now let's continue. We have some physical students here, so don't worry.

[00:18:32]Now who is having more Who is having more Who is having more uh priority? OH or ketone? I'm waiting for answer, you know. Ketone. Ketone.

[00:18:43]Have you seen ketone? Yes, good girl.

[00:18:44]Ketone. Sebastian. Ketone. Who else again?

[00:18:49]The priority we give Yes. Oh Adeyeye.

[00:18:52]Yes, thank you.

[00:18:54]Yes, And you are Yes, ketone. Thank you. The one we'll be giving priority to the most is our ketone. Is that okay?

[00:19:01]Now if ketone is the priority If ketone is the priority, then how do we go about it?

[00:19:09]If ketone is the priority, who are we going to give position number one to?

[00:19:12]Because we have two functional group. Are you getting it?

[00:19:19]We have two functional group.

[00:19:21]We have two functional group. So who are we going to give position number one to?

[00:19:24]Because the functional groups are the one that should have this. Are you getting it? So you know what? Because these are many carbons I have. These are six five carbons, right? And you want to start naming, right? You want to start giving them number. You want to give them number in such a way that they are very very what? Small. Are we? So if you want to give number, which side do you give number? One to this, one to this, one to this? No. There's nothing here.

[00:19:45]Now what is here? Hydrogen.

[00:19:47]So who do we give position number one?

[00:19:49]This ketone or this OH? Ketone.

[00:19:52]Could you elaborate on it?

[00:19:54]It's the Who are we giving priority to? OH ketone, right?

[00:20:01]Yes, we are giving priority to ketone.

[00:20:03]So, meaning that this guy will be in position number what? One.

[00:20:07]Are you with Should we say we should give priority to ketone?

[00:20:10]So, our carbon here, this carbon here will be carbon what? One. Are you with me?

[00:20:15]You know there are two functional groups.

[00:20:17]Because the question you might be asking me that "But sir, why can't you say this carbon is carbon one?"

[00:20:22]Why can't we say this carbon is carbon one?

[00:20:24]I said we have two functional groups. It is those functional groups that we give priority to to ensure that they are very small. Is that okay? But in this case, we have two of them. So, you see that we give one to this or we give one to this. Is that okay? So, who are we giving the one to? This guy. So, if this guy is number one, bam, we now have to start counting. Either we count in clockwise manner or what?

[00:20:46]Anti-clockwise manner. Are you with me?

[00:20:49]We are counting in what? Everybody, clockwise manner or what? Anti-clockwise manner. If you are counting in anti-clockwise manner, let's go. This place will be what? One.

[00:20:59]This is going to be what? Two.

[00:21:01]And this place is Somebody say why ketone? Ketone is giving more priority because uh If you check, ketone is having Let me tell you guys that are having more priority than ketone.

[00:21:11]Carboxylic acid is having more priority than ketone.

[00:21:14]Uh well, who else again?

[00:21:16]Uh esters, carboxylic acid and its derivatives alkanal and ketone. What I say again? Alkanal and ketone are having priority more than what? OH.

[00:21:29]Is that okay?

[00:21:31]Uh-huh. If you have been attending my class, I said it to you about G.

[00:21:36]Alkanal, alkanone, carboxylic acid, they are higher what? If you see the way they give you the trend of the families of the organic compound, you will notice that they gave you alcohol, then after alcohol, they move to what? Alkanal and alkanone. Then after alkanal and alkanone, they now move to what?

[00:21:51]Carboxylic acid and its derivatives. So, those who are seeing that question, is that clear?

[00:21:56]I believe that is clear. So, yeah, you can keep tapping on the like button, please. Start tapping on the like buttons. Thank you so much. For those who are enjoying that class, then ensure If you have not subscribed, ensure you subscribe. Tap on the like button. Yeah, so that um and ensure you subscribe so that you can get notification of classes like this all through the break. Is that okay? So, tap on the like button, subscribe. If you are enjoying the class, just subscribe and ensure uh So, let's continue. So, OH This This one This ketone is given priority number one. We all agree now. So, this is one.

[00:22:35]Now, the question is should I count This is anti-clockwise or should I count what?

[00:22:41]This is anti-clockwise, against the clock and This is what? Clockwise, you mean now?

[00:22:47]So, my question is should I count one, two, Let me use the data.

[00:22:54]Did I count one, two, three?

[00:22:59]Should I count one, two, three?

[00:23:02]Or should I count one, two, three, four?

[00:23:05]Which one will be better?

[00:23:07]Why are we going for one, two, three anti-clockwise? If I do one, two, three, four, OH will be in position number what? Four. If I do one, two, three, OH will be in position number what?

[00:23:20]Everybody, three. [clears throat] So, what do we want? We want it to be in position number three or position number four? Position number four. So, if this guy is If this guy is in position number one, by counting one, two, three, OH will be in position number what? Three.

[00:23:33]But if I go this way, one, two, three, four, OH will be in position number four. So, we want to ensure that our functional group or substituent are at the smallest possible number. So, what are we doing with So, one, two, three.

[00:23:45]Is that okay?

[00:23:46]So, the whole thing is having how many carbons, everybody? Five.

[00:23:50]So, anytime you see this is cyclo cyclo it's a cyclo al what?

[00:23:55]Uh-huh. So, root name The The major name will be The parent name will be cyclo Is that okay? Then we now say pent what?

[00:24:03]Because this guy is already in position what? One. Are you with me?

[00:24:06]Pent anone.

[00:24:13]Pent anone means that that guy is in position number what? The don't The The This guy, I mean the alkanone, is in position number what? One. Now, what do we now call our OH? What I say we call OH? OH is not given priority to. What do we refer to as? What do we do with OH if OH is not given priority to?

[00:24:31]Who remember that? If OH is not given priority to, what do we call it? It will be hydroxy. So, because OH is not taking priority now, it's not going to be bearing the name OR. It's going to be bearing the name what? Hydroxy. Who remember that? So, this is going to be hydroxy, right? So, what then do we call this? We then say what, everybody?

[00:24:49]What position is hydroxy? One, two, three. That will be three what? Hydroxy what? Cyclo pent pentanone. Three hydroxy cyclo pentanone.

[00:25:03]Yes, three hydroxy cyclo pentanone. Is anybody having question before I give you I have a question for you that you will name for me.

[00:25:12]I have a question for you that you will name for me.

[00:25:16]I sent a question I have a question for you.

[00:25:19]Alkanal and alkanone, who who has priority more? Alkanal has more priority than alkanone even though they are the almost the same. But most times, you really see them putting them together in a compound. But sometimes, you can find them together on a what? Compound. And this compound can have both alkanone and what?

[00:25:41]Alkanal Yes, alkanone and alkanal.

[00:25:44]Any more question?

[00:25:46]>> [snorts] >> What about the alphabetical order of the naming? Somebody is asking for alpha alphabetical order. It's very simple. We said three hydroxy. Hydroxy in This is the uh what do you call it? The prefix now. Is that okay? We don't have more than The only thing we have here is OH.

[00:26:03]Is that clear?

[00:26:04]So, there's nothing like This is the What's the parent name, everybody? The parent name is what? Cyclo pentanone.

[00:26:10]What I call the parent name? Cyclo pentanone. This is just the prefix.

[00:26:17]So, I think that is clear. Who is having more question? Can we move on to the next thing? Now, I have a question for you. I have a question for you. I'm coming. I have a question for you.

[00:26:29]I need somebody to help me name uh I think I sent some questions to the group that day.

[00:26:37]You people I don't know if you solved the question, but I just have a question for you.

[00:26:43]You help me name this compound.

[00:26:47]I have a question for you.

[00:26:51]>> [clears throat] >> So, please a minute, we are addressing something. Just um You You want to um lock this place.

[00:27:01]I don't think they can see you.

[00:27:04]Office there. Sign a passport.

[00:27:06]I'm bringing it to you.

[00:27:09]So, now let's I have a question for everybody. So, wait for I'm coming.

[00:27:13]Sorry for the breaking transmission. We are addressing something.

[00:27:17]Where is the question? Oh.

[00:27:19]Okay, I think I've seen it.

[00:27:21]Now, who can draw Who can give me a structure of Give me the structure, everybody. Give me the structure of cyclo Write the structure of cyclo hexa 1,4-diene.

[00:27:36]Give me the structure of cyclo hexa 1,4-diene.

[00:27:43]Give me the structure of that compound.

[00:27:45]Cyclo hexa 1,4- 1,4-diene.

[00:27:51]I need the structure of that compound.

[00:28:01]Oh, yeah, yeah, yeah, yeah, yeah. Those who are asking, they can rewatch it. You better start watching it now. I might not upload it to Start watching it. Start watching it.

[00:28:12]I don't know why Some of you are playing at home. Some of you are eating. Pay attention to what I'm doing. It's very very important.

[00:28:19]I know it's annoying you guys. You have no data. Meanwhile, I have data.

[00:28:22]So, we have cyclo hexa 1,4-diene.

[00:28:34]Keep tapping on the like button.

[00:28:37]Now, are you done with the diagram?

[00:28:40]I think How can they send the diagram?

[00:28:42]Can they send the diagram?

[00:28:43]I don't think they can send the diagram.

[00:28:45]They can't send the diagram.

[00:28:47]But guys, you all draw this. Maybe that will be our assignment for you. Some of you cannot draw this, oh. But yeah, let's go. Cyclo Let's draw the cyclo hexa. What does cyclo mean? Cyclo is a ring structure, are we?

[00:28:59]What's the rule of hexa? Hexa means how many sides? Six sides. That means the cyclo we are drawing is how many sides?

[00:29:05]Six sides. So, six sides will mean um one, two, three, four, five, six. This is cyclo hexa.

[00:29:16]Do you all get that?

[00:29:17]Cyclo what? Hexa.

[00:29:20]Now, they now said 1,4-diene.

[00:29:22]What's the meaning of 1,4-diene? The guy is having how many?

[00:29:27]Two double bonds. One in position number what? One. And the other one in position number what? Two four. One in position number one and one in position number four. So, you can take it from any Any way you want to make your number one. Do you get what I'm trying to say? So, we can because this structure can be different for everybody. But the question says it's cyclo hexa hexa 1,4- 1,4 means you can pick it your your double bond one is in position 1 1 and the other double bond is in position number what everybody? Four.

[00:29:56]Meaning that you can pick your number one from anywhere then count it to four.

[00:30:01]Is that okay? So, where do you want to pick our number one? Some people can pick theirs here. They can pick theirs here. Pick theirs here. That's why the structure will be different from for different people drawing it. Is that okay?

[00:30:11]So, So, I can put it here. I can put it in any I can put it in number one. So far you have your number one first then you reference it to be four. Is that okay?

[00:30:19]So, for example, let's say we use Where do you people want to use? Should I use here or should I use here? I can use any part for my number one. Do you get it?

[00:30:26]Let's imagine that this is number one.

[00:30:30]I use number one.

[00:30:31]So, this is your one.

[00:30:34]You can count Another thing is that anytime it's double bond, you have to count one two. What I said again? One two.

[00:30:40]Do you get what I said?

[00:30:42]That means you don't say one two three four.

[00:30:45]Anytime you have the double bond, that is how you say you count one two. What do I mean by one two? One two or what?

[00:30:51]One two. Do you get it?

[00:30:53]So, if this is one two, like this you are going like this.

[00:30:56]Or the other way is what? One two. You are going like this. Is that okay? So, this is one two. Uh-huh.

[00:31:04]Three. Uh-huh.

[00:31:05]Four. So, where would I put this? Here.

[00:31:08]For another person, you say one two three four. It's still landing there.

[00:31:13]I think that is clear and correct.

[00:31:17]Are you here for the chemistry class?

[00:31:20]Okay, can I have your seat?

[00:31:23]So, Do you all get this everybody? Though we have class both online and and physical. So, I'm going to be addressing you people and I'm going to be addressing them. Is that okay? So, if you do not understand, ensure you call attention.

[00:31:39]Now, what we did was we tried to name some cyclic compounds because the reason why you have to know all these is because if you are dealing with questions, they will call out the name of those compounds and you are expected to be able to draw it. If you cannot draw it, you fail in that part.

[00:31:56]Is that okay?

[00:31:58]Thank you. So, I think that is clear.

[00:32:02]Um Is anybody having a question? Is anybody having a question online?

[00:32:09]Is anybody having a question? We just had a What I did was just a a quick a quick um revision on how to name the cyclic compound. Ensure you tap on the like button.

[00:32:21]I don't mean that. Please, can we download the class and watch later?

[00:32:25]Um I might not upload the I might not upload it but let's just see what we have. I might decide to upload it. But for now, just join the live class. I can see some people asking me that question.

[00:32:35]Now, did everybody understand that? Can I give you a compound to name? Yes.

[00:32:40]Try this and let's move away from this and go to the next thing.

[00:32:43]I want you to try this.

[00:32:47]Try this. Why have we been using this cyclic cyclic cyclic?

[00:32:51]This is cyclic. Try this um Let's imagine we have OH here.

[00:33:00]We have COOH then we have CO.

[00:33:11]And put BR here.

[00:33:15]Now, I want somebody to name this compound on the board.

[00:33:19]Try to name that compound. Everybody try to name that compound and let's do this naming on cyclic Name that compound for me, please.

[00:33:32]Diene. Somebody is asking about diene.

[00:33:34]Diene means two double bond now. Diene is a functional group. Diene in means a double bond. Diene means two double bond. These are the two double bonds. I see.

[00:33:46]This is cyclic hexa. Hexa means 1 2 3 4 5 6. That's the meaning of hexa. Is that okay? Then we say cyclic hexa 1,4 diene.

[00:33:56]Ine means uh alkene, right?

[00:34:01]So, they now say 1,4 diene. Two double bond. One in position number what? One and the other one in position number what? Four. That's the meaning of that.

[00:34:10]Then try this naming. I'm waiting.

[00:34:16]Oh yeah yeah yeah yeah yeah.

[00:34:18]I repeat that because some people were asking that they didn't get it. So, yeah.

[00:34:22]Let's try this name.

[00:34:25]Who is the power here? This is how many sides? This is a six sides.

[00:34:29]Now, which of them How many functional groups can you see here? Functional groups.

[00:34:34]COOH is a functional group. Do you agree with me? Yes.

[00:34:39]This is a functional group.

[00:34:41]Right?

[00:34:42]OH is also another what? Functional group.

[00:34:47]Right?

[00:34:48]Then what else can you see? Then we have uh We have what?

[00:34:55]A This is one functional group. This is one functional group, right? BR is not a functional group. It's just a substituent. Is that okay? Now, the question is that between COOH and OH, which of them is having more priority?

[00:35:08]COOH, abi? Because COOH is having more priority. Then how do we name this compound? That's the question. How do we name this compound? Let me make it more complicated. Let me Let me do something something something easier.

[00:35:26]This is CO.

[00:35:28]Then let's leave it like that.

[00:35:29]Now, I want you to try this naming. Do it and send the answer to me.

[00:35:35]4-bromo-4-hydroxy cyclo hexanoic acid. Okay? Just try. Somebody try to name it. I want people to try that question.

[00:35:46]Try that question. Try that question.

[00:35:48]Try that question.

[00:35:51]Two. Now, who is the Who is the major priority? Do you know this major priority?

[00:35:57]And then try that Let me give it out as just an assignment.

[00:36:00]Because I've given you a lot of question now. So, let me move to next thing so that I won't bore you with too much of this naming. We have been doing For those who are just joining, we have been working on naming cyclic compounds. Is that okay? I know many people are familiar with uh straight chain linear compounds. But sometimes your question can involve that you know how to draw back the cyclic compound. Is that okay? And I've done that. So, I want us to move to um what we Where we stopped in class. I don't know maybe some of you We have been Where we stopped in class was on We are looking at boiling point melting point. But let me do something today. Everybody write. Now, if you are my student, your tutorial notes, you don't need to write in your tutorial notes. Just write this separately somewhere because I'm not going to continue from where I stopped from the tutorial. I just want to give you some things that are relevant that can make you solve some questions from your past question now. Is that clear? So, write stability of alkene. Just write stability of alkene.

[00:37:02]Oh yeah yeah.

[00:37:04]Stability of alkene.

[00:37:08]Stability of alkene.

[00:37:11]Somebody write something like that.

[00:37:12]Stability of alkene.

[00:37:15]Stability of alkene. Everybody write stability of alkene.

[00:37:20]Stability of alkene.

[00:37:30]Stability of alkene.

[00:37:41]Now, let's look at stability of alkene.

[00:37:45]Stability of alkene.

[00:37:50]Now, questions comes out on this particular year and I want us to quickly address this. Everybody know an alkene normally they are the guys that have double bond. Should be You get that.

[00:38:02]Now, what is the stability of alkene?

[00:38:04]They gave us several stabilities and these are the stabilities. Number one, the stability of alkene means which of the alkene is more stable. And what can make alkene to be more stable is alkene that have more substituted alkyl.

[00:38:19]What did I mean by that? For example, Where is my animation? Give me ink.

[00:38:30]Try to move forward.

[00:38:32]So, we have C. We have C. Can you see?

[00:38:35]Now, we have R. We have R.

[00:38:38]We have R. We have R.

[00:38:41]Now, this is one type of alkene.

[00:38:44]How many How How R is what I call R? I call alkyl. Alkyl. Do you get it? Alkyl here is they are methyl, ethyl and the likes. Do you get that? Now, this is an alkyl alkyl alkyl alkyl. Is that okay?

[00:38:57]These are alkyl groups. Now, how do you know the alkene that is more stable? The alkene that is more stable is the one that have more substituted what? Alkyl.

[00:39:10]Is that okay? How many substituted alkyl do we have in this compound? One two three four. We have four substituted alkyl.

[00:39:19]Is that clear?

[00:39:20]I'm saying it again.

[00:39:22]Stability of alkenes. That is what we are doing.

[00:39:27]Stabilities of what? Alkene. The more substituted your alkene, the more stable that alkene. Is that clear? Now, we are going to attempt a question from your past.

[00:39:38]So, be ready. I I know if some of you have your past question here, but I'll try to see what we can do. Now, the most stable if your alkene will be stable if you have more alkyl group. So, write it down.

[00:39:52]Write it down.

[00:39:54]The more alkyl group Hey, where's manager? I need to Come and change this thing.

[00:40:00]The more alkyl group, the more the what?

[00:40:04]Alkyl group.

[00:40:08]I need black black board to The more the alkyl group, the more stable the what?

[00:40:16]The alkene. Everybody should note that.

[00:40:19]Write that. The more the alkyl group, the more the alkyl group, the more stable the alkene.

[00:40:28]Is that clear?

[00:40:29]The more the alkyl group, the more stable the alkene.

[00:40:35]Now, what are alkyl group? Alkyl groups are what? Alkyl groups are methyl, ethyl, ethyl, and the like. Alkyl Is that okay? Now, let's compare this guy to this guy.

[00:40:52]Now, everybody look at these two compounds. Who is more stable between the two of them?

[00:40:57]Compound A and compound B. Who is more stable in compound A and compound B?

[00:41:05]Compound B.

[00:41:06]Compound A. Why is compound A?

[00:41:11]You are not talking. Come on, both of you.

[00:41:13]Who is more stable, compound A or compound B?

[00:41:17]Compound A. Compound A is more stable because it has more alkyl group. Is that okay? This is 1 2 3 4.

[00:41:26]Sorry. This is 1 2 3 4. It's just like having something like this. Maybe I can draw it. It's just like having something like this. Uh Just like having something like this.

[00:41:36]CH3 and something like this CH3 with CH3 and something is having CH3 and we have CH2CH3.

[00:41:47]Now, look at Look at it. This is the carbon here. This is the carbon here.

[00:41:52]So, how many alkyl group How many substitution do we have there? We have 1 2 then we have 3 then we have 4. So, because it is 4, it is not what? It is not substituted and it is not stable.

[00:42:06]Now, in chemistry, anything that is stable normally have lesser energy.

[00:42:10]Write that. The Any compound that is stable, everybody should put down that down in your notes. Any compound that is stable will have a lesser energy. Put that down in your notes. Every compound that is stable Yes. Every compound that is stable will have less what?

[00:42:37]Energy. Is that okay? So, you have to write that. Now, between compound A and compound B, who is more stable? You said compound what? A is more stable. Why is compound A more stable? Because it has more alkyl group, right?

[00:42:52]Now, they can ask you a question.

[00:42:53]Between compound A and compound B, who has the lesser energy, the least energy?

[00:42:59]Compound what? A. Why is compound A having the least energy? Because it is the most what, everybody? It is more stable, right? I'm saying it again. Put it down. Any compound that is stable will have a less energy. While compound that is unstable, what do you think will happen to compound that is unstable, everybody?

[00:43:17]They will have higher energy.

[00:43:19]Is that okay?

[00:43:22]So, everybody hears me. Okay, thank you.

[00:43:25]Thank you. You are following.

[00:43:26]Now, I need black marker. Don't you move down. Now you see me.

[00:43:30]I just need black marker. I need to find a way to work on that black marker.

[00:43:34]Now, everybody come back to the class.

[00:43:36]Let's see again. Oh, yeah. Let's see another dimension. Let's see another dimension.

[00:43:41]C C R R H and H. This is tetrasubstituted.

[00:43:49]What's the meaning of tetrasubstituted?

[00:43:52]1 2 3 4. How many alkyl group is there?

[00:43:55]Four. This guy is having what? It's trisubstituted. What's the meaning of trisubstituted?

[00:44:00]1 2 3. Three alkyl group, right? But let's look at this compound C.

[00:44:07]How many alkyl group is in compound C, everybody?

[00:44:12]Two alkyl group. You can see 1 2. Abi?

[00:44:15]This is di what? Substituted. Now, this one is greater than this one.

[00:44:21]This guy is greater than this guy. Are you getting it? And this guy is greater than compound what? C.

[00:44:26]Is that okay?

[00:44:29]Now, let's go to another type of another type of dimension you can have.

[00:44:34]And what's that dimension?

[00:44:35]This guy This compound C is greater than compound like Let me see.

[00:44:39]Maybe you see that. Okay.

[00:44:41]And we have C double bond C.

[00:44:45]You now have uh You have uh You have R We have H We have R Then we have H. We have something like this. Then I'm coming I think we have three of them.

[00:45:13]I want you to use this to attend the question. Yeah, I have a question for you. And that question, if you understand this thing very well, you will get the question immediately.

[00:45:22]So, I want you to get it well.

[00:45:27]Okay.

[00:45:30]Okay. Trans. I need trans.

[00:45:33]Now, everybody should be familiar with something like this.

[00:45:38]When you When you get to isomerism, you'll be familiar with it. This is a trans. What I call it? Trans.

[00:45:44]When you get to isomerism, you will understand. We have trans isomerism and we have what? Cis. You got it?

[00:45:50]This compound and this compound, what do you notice about them? They both They are both disubstituted. Do you know?

[00:45:55]That means they both have two alkyl. How many R do they have there? 1 2. But this compound is also having how many? 1 2.

[00:46:02]They both have the same They both have the same alkyl group. Is that okay?

[00:46:07]But if you see this guy, this guy is more stable than this guy. Why? Because the two alkyl group are on one carbon.

[00:46:15]Do you get it?

[00:46:16]The two alkyl group are They are on what? On one carbon. Are you with me?

[00:46:21]Thank you. But in this case, what happened? Are the two alkyl group on one carbon? No. They are on separate what?

[00:46:27]Carbon. And it is giving us some type of vibe. Giving us a what? A trans. This is a trans. You are with me?

[00:46:34]If you have a trans, you know you can also have a cis.

[00:46:36]Let me show you the cis. Now, this trans structure is greater than the cis structure. How does the cis structure looks like? Everybody write it down. The cis structure is given as what? R and we have C C. Let's imagine we have H We have H. Then we have what? R Then we have what? R. Now, the trans structure is greater than the most stable The trans structure is more stable than what? Cis structure.

[00:47:07]So, let's go over it again. What have you learned about stability of alkene before I bring in the question, a practical question?

[00:47:14]For stability of alkene, I believe everybody is writing. Where are you writing down? Write write write write. I want to clean this board now.

[00:47:19]Write write.

[00:47:22]We have 123 students joining the live and we should be more than this. I don't know what happened to them. Click on the like buttons. Ensure you click on the like buttons. If you have not subscribed, ensure you subscribe to the YouTube channel so that you can get more access. Oh, yeah, everybody. We have compound A, compound B, compound C. We have C then we have D.

[00:47:44]Then we have what? E.

[00:47:47]Now, what is the code again? The code is that we are looking at stability of alkene.

[00:47:53]How can alkene be more stable? The one that is having more alkyl group will be more stable. In In the case of compound A, how many alkyl group do we have?

[00:48:03]Four. 1 2 3 4. Very simple. Abi?

[00:48:07]Compound B, how many do we have? 1 2 3.

[00:48:11]Trisubstituted. Abi?

[00:48:13]So, this should be more stable than this, right? Because this is having three alkyl group. 1 2 3. And this is having four. Now, let's go to compound C. Compound C is having how many? Two.

[00:48:23]This one is having three. That's why it is more stable than this one. This one is having how many? Two. This is having two. And the two alkyl group are on what? One carbon. Not on Is that okay?

[00:48:33]The two of them are on just one carbon.

[00:48:35]Do you get that? Then Now, for the trans, the trans is two alkyl group, but in the trans structure, and each of the R are on separate carbon. Is that okay? Then the cis, what happened to the cis? The cis is having two R also on separate carbons. Abi?

[00:48:55]The trans and cis, which one is more stable?

[00:48:59]Trans structure is more stable than what? Cis structure. Now, let's now move to solving a real question.

[00:49:06]Everybody is having the case to see R.

[00:49:08]Maybe you don't know the meaning of R.

[00:49:09]What What are R?

[00:49:11]Let me just make it easier for you. R means anytime it is attached to C. Do you get it? C means carbon. What I call C? Carbon. Every alkyl group starts with a carbon. Abi?

[00:49:22]So, anytime you just look at your carbon, you got to Is it connected to a carbon?

[00:49:27]That's what I just labeled.

[00:49:29]Is it connected to a what? A carbon.

[00:49:32]Do you get that? Because the question they gave they gave, that question was not looking at it as something. I'm going to write out those questions now and we are going to solve it together.

[00:49:41]Is that okay? Now, let me clean up this.

[00:49:45]Let me clean up this.

[00:49:47]Give me that past question.

[00:49:49]Someone give me a past question.

[00:49:52]I believe you all put down the structures that we have here.

[00:49:59]Give me the past question. Thank you.

[00:50:01]Let me give you a question from the pack.

[00:50:14]Just a minute. Let me give you a question I saw that I think we need to look at together.

[00:50:23]Just a minute.

[00:50:26]So, let's look at this question. Just a minute, everybody.

[00:50:31]Let's take a look at this question. Now, this is my question.

[00:50:35]Now, this was the how to how to take a look at this structure.

[00:50:44]Take a look at that structure.

[00:50:51]Look at that structure.

[00:50:53]I want you to determine the number.

[00:50:56]Oh, yeah. Determine the This question is in the pack.

[00:51:00]And imagine it's not looking like as if they have alkyl group they are doing.

[00:51:03]Now, they said I want you to determine the number of alkyl group that is attached to this alkene. So, the first question is this.

[00:51:14]The page Okay, somebody is asking for the page. The page is page 143. Don't worry. Page 143 Just look at the board, everybody. I'm going to give you a separate question.

[00:51:24]Page 143. Now, let's go to page 143, everybody. But everybody, fix your eyes on this question, please.

[00:51:30]Where is the Where is the alkene that we are all concerned about?

[00:51:34]Shebi this is So, this is our alkene. This is the alkene that we are all concerned about.

[00:51:41]Now, I want to I want you to determine how many alkyl group will you count for this compound?

[00:51:48]What I said about alkyl group, I said this is Shebi this is your target. Shebi this is your C=C. And this is your other C, right?

[00:51:56]Now, trace this. It's attached to a carbon. Shebi you know it's attached to a carbon.

[00:52:03]Trace this one.

[00:52:05]Everybody, carbon. Shebi now?

[00:52:07]Then trace this down here. It's also attached to a carbon. Now, let me let me ask you a question. How many alkyl group will you say this guy is having attached to it? Four. Where is it?

[00:52:17]One.

[00:52:19]Two. Uh-huh. Three. Uh-huh. Four. That is why I said You know when I drew this, I said C C and I said R R. I had what? R. And I said what? R. Abi? I said this one that you are looking at, this attachment that I said is alkyl. So, in a real sense, don't disturb yourself. Just look at this. Is it attached to another carbon?

[00:52:41]Do you get what I'm about to say?

[00:52:42]So, this R that you are seeing means that is it attached to another what?

[00:52:46]Carbon. Another what? Carbon. Another what? Carbon. Another what? Carbon. How many carbon is attached to this? Like that, four. Because it's four carbon that is attached to it, we say it is four alkyl group. So, in this case, how many alkyl group is there? It's attached to a carbon here, one.

[00:53:02]Attached to a carbon here, how many?

[00:53:03]Two. Attached to a carbon here, how many? Three. And attached to a carbon here, how many here? Four. Do you have any question online?

[00:53:11]Oh, yeah.

[00:53:14]Yes.

[00:53:15]Yeah.

[00:53:19]This is our target. Shebi this is this is our target.

[00:53:22]What is it directly attached to is what Is it directly attached to another carbon?

[00:53:30]If it is directly attached to If your If this Who is our target? These are our two targets. Abi?

[00:53:35]Because they are the ones surrounding the the the what? The double bond. Abi?

[00:53:39]Now, these two guys that is here, you look at it that What is it directly attached to? If it is directly attached to a carbon, you count it as one alkyl group. Is that okay?

[00:53:48]If it is directly attached to another carbon, you count it as another alkyl group. How many alkyl group like that?

[00:53:52]Two. Here, three. Here, four. Do you all get that?

[00:53:59]How are we going to know the one attached to it? It is very simple. I said it here for those who are online.

[00:54:05]This is the two carbons that we are concerned with.

[00:54:08]The carbon of the alkene. Abi? Then look at this. Trace. What is it directly attached to? You see there is a carbon here now.

[00:54:14]And look again, there is a carbon here.

[00:54:17]Look again, there is a carbon here. And look again, there is a carbon here. How many carbon is Is it directly attached to? One, two, three, four. Because it's attached to four carbons from different angles, we can say it is it is having four alkyl group around it. Is that clear?

[00:54:33]Now, let me give you another one.

[00:54:35]Let me give you another one.

[00:54:38]Let me give you another one.

[00:54:41]Please tap on the like button. Let me give you another one.

[00:54:45]I want you to try this one if you will get it.

[00:54:49]Yeah, try this one.

[00:54:54]Okay.

[00:54:57]Try this one.

[00:54:59]How many alkyl group do we have on this compound?

[00:55:18]That's the question. Is it that same question?

[00:55:21]Oh, yeah. Oh, yeah. So, everybody, what's our target? I'm giving you a new compound. Oh, yeah. Oh, yeah. You see a new compound.

[00:55:27]What's our target now?

[00:55:33]Ah, who said it's not clear? This is clear now. This is that diagram. Look at it. This is our target. Okay, don't worry. Let me get there. I will explain.

[00:55:41]But I will I will explain it. Now, If there's nothing here, sorry. It's like this. Sorry.

[00:55:47]There's nothing here. It's like this.

[00:55:51]Now, everybody, take a look at this structure. What we are we concerned with? We want to look at stability of our alkene. Shebi?

[00:55:58]Where is the alkene part?

[00:56:01]This is the alkene part. It's not a big concern. There's no O here. This is the alkene part. Do you all agree? There's no O here. Sorry, it's a mistake. This is the alkene part. What are we concerned with, everybody? Where is that C=C? I need you to show me where where that C=C is.

[00:56:16]Where is C=C?

[00:56:19]This is C=C. C double bond uh-huh C.

[00:56:25]Do you get it?

[00:56:26]You can put in everything. Here now, I know that this carbon now, you know it's what I wrote here. Do you know? Do you know?

[00:56:32]What is What is it that surrounds this carbon? Because this carbon is not complete. How many? One, two. C. Is there any carbon here? How many alkyl group? Two. One. Uh-huh. Two. Do you have any C?

[00:56:42]Shebi?

[00:56:44]Oh, yeah.

[00:56:45]Let's go.

[00:56:46]So, my question is this. This is our C=C.

[00:56:50]Uh-huh. How many Check on this carbon.

[00:56:54]What is this carbon directly attached to?

[00:56:57]Oh, yeah. I don't want to know. What is this carbon directly attached to?

[00:57:03]It's attached to hydrogen and attached to another what? Hydrogen.

[00:57:06]Thank you.

[00:57:08]What is this carbon directly attached to? Those who are online, please pay attention.

[00:57:13]This carbon This carbon here, what is it directly attached to, everybody?

[00:57:18]It's directly attached to one. This is a carbon. Abi?

[00:57:22]Directly attached to one. This is a carbon. Abi?

[00:57:25]>> [clears throat] >> So, how many carbon is is is like how many alkyl group do you say Do you say this guy is having? Two.

[00:57:32]Two alkyl what? Group. If you check this guy, that means it has only one one.

[00:57:36]Shebi now?

[00:57:37]Which is hydrogen and what? Hydrogen.

[00:57:39]Hydrogen and hydrogen will not be counted, right? This is our two guys we are concerned with. This carbon and this carbon. So, when I look at this carbon, all I saw here is hydrogen and what?

[00:57:49]Hydrogen.

[00:57:50]Is that okay?

[00:57:51]When I look at this carbon, if you look down, it's connected to a carbon. Abi?

[00:57:57]If you look up, it's connected [clears throat] to what else again?

[00:57:59]Carbon. Because it's connected to two carbons, we can say it's having how many alkyl group? Two alkyl group. Is that okay?

[00:58:05]Two alkyl group.

[00:58:07]This one is having how many alkyl group?

[00:58:08]Four alkyl group.

[00:58:12]Is that okay?

[00:58:13]Now, let's pick another one.

[00:58:18]Because that question, it was a particular year like that.

[00:58:23]You will tell me the number of alkyl group this guy is connected to.

[00:58:27]Um So, that would be good.

[00:58:40]Now, everybody, let's take a look at this structure.

[00:58:43]Oh, yeah. Oh, yeah. Oh, yeah. Oh, yeah.

[00:58:47]Thank you, guys. I see.

[00:58:49]Now, let's look at Where is our Where is our C=C?

[00:58:56]Hello. Where is our C=C? In this compound now, where is our C=C?

[00:59:02]I want to see the C=C.

[00:59:07]Sorry.

[00:59:11]This is the C that is attached to another C. This is C=C. Do you all agree?

[00:59:19]Uh-huh. Now, if this is the C=C, look at what we have here and what we have here. Then look at this carbon. So, I'm going to be looking at this carbon and this carbon and this carbon is my target. Is that okay? Now, on this carbon now, what to something up here, which is another CH3. Do you agree with me?

[00:59:39]Yes. So, it is attached to a C, which is one.

[00:59:43]Now, look at this carbon. How many things is this carbon attached to? It's attached to a C here.

[00:59:48]Then, it's attached to a C here. How many C in total?

[00:59:52]Three. This is one C, two C, and what? Three C. How many C in total? Three. That's three C. If it is three C, it it signify what? Three what?

[01:00:03]Alkyl group.

[01:00:10]If it is three C altogether, it means three alkyl group. If it is one C, one alkyl group. If it is Do you get that?

[01:00:17]As simple as that. So, this is how many that I have. This is I I I do This is four alkyl group. This is two alkyl group. This is three alkyl group. I'm going to give you something you are going to try. You don't worry. I think some people already getting it online.

[01:00:30]Yes.

[01:00:32]This question came out in particular year, so I'm explaining it.

[01:00:37]Then, we have one more to go that you will tell me the answer. I want those people online to tell me this answer.

[01:00:44]Everybody online, you will give me the answer to this question.

[01:00:58]Everybody online, give me the answer to this question. So, how many alkyl group is attached to this our double bond?

[01:01:04]Everybody here too. You have to start doing it. Physical, online, give me answer. How many alkyl group is attached to this our alkene? I want to see answer.

[01:01:15]Yes, it depend on the goods.

[01:01:22]Yes, somebody is asking online that Does it depend on The thing we are doing is stability of alkene now. Should you all understand?

[01:01:30]That is Thank you. Everybody online is saying one, one. Are we saying two?

[01:01:39]Baraka.

[01:01:40]Where are we concerned with? Should it stability of alkene we are doing now?

[01:01:45]And we are only concerned with this side.

[01:01:47]Because it's an alkene, should be. Now, where do you see double bond C?

[01:01:52]C double bond C. This is C double bond C.

[01:01:56]Should be now.

[01:01:57]Then, you now check on this our C.

[01:01:59]C double bond C. Now, on this one guys, this guy here, what we have there is H and what? H. Should be, you know.

[01:02:06]But, what's attached directly to this our C that is here? The only thing that is attached to it is this carbon that is here. So, how many carbon is here? One.

[01:02:13]So, guys, that this is C double bond C.

[01:02:16]On this C, we have hydrogen and hydrogen, which we don't need. But, on this C, we have it directly attached to this carbon, which is signifying one carbon. Because it's one carbon, it's going to be one alkyl group.

[01:02:35]Yes.

[01:02:37]We are considering only the double bond because we are doing stability of alkene. So, Clement, Clement, what's your question? What exactly is it that you don't get, Clement?

[01:02:48]Oh yeah, oh yeah. Now, based on what we've done here, I want somebody to tell me which of them is the most stable and which of them is the least stable.

[01:03:00]Clement, oh yeah, tell me where exactly you are not getting it right.

[01:03:06]Oh yeah, which one is the most stable, Jerry?

[01:03:08]The one with four now. The one that have four alkyl group.

[01:03:11]This guy is having one, two, three, four. Should be.

[01:03:16]Eh. So, the one with the four alkyl group.

[01:03:18]So, if I say which one is the most stable, it's the guy that have four alkyl group. Should be.

[01:03:24]Which one of them is the least stable?

[01:03:26]What's the question? Which of them is the least stable?

[01:03:30]The one with what?

[01:03:32]Where is it? Where is it? That guy there. Abi?

[01:03:36]Where is Clement? Clement.

[01:03:39]Clement, where's What's your question?

[01:03:43]Now, the reason this thing is looking somehow like this is because some of you did not attend the line when I was doing something online formula.

[01:03:53]Is that okay? This is because if you understand line formula, the way I'm doing this diagram, it should not be difficult. Is that okay? Because I taught them line formula. The way you can convert a line formula to Is that okay?

[01:04:05]So, some of you were not there.

[01:04:06]My other brother, I sleep in. Hope you are fine. Let me tap him.

[01:04:11]Hello. Hope you are fine.

[01:04:16]Hello, Shae.

[01:04:18]>> [snorts] >> Oh yeah, Clement. Is there any question?

[01:04:22]Where is that, Clement?

[01:04:28]Now, I'll give you a question. There's another question I had earlier.

[01:04:31]Now, if I say most stable, I know I told you that the one of Any one that is the most I said most stable means it will have what? Less energy.

[01:04:40]Do you get that?

[01:04:41]Anything that is not stable, the energy will be too much. But, if you are very, very stable, your energy will be very less. That's chemistry for you.

[01:04:50]So, if a question can say, "Among the four of them, who is most stable?"

[01:04:55]The guy that have four alkyl group. Abi?

[01:04:57]Among all of them, who is the Who is having the least energy? Who you see?

[01:05:02]The one with four alkyl group. Do you get that?

[01:05:06]So, where is Clement? I did not see the Clement, oh.

[01:05:10]Now, let me put a question and another diagram on the board, and anybody will do that one.

[01:05:17]If that is all we do today, then we stop. Then, another group will go again. question on stability is very, very important. And in fact, we check the past question. They didn't really explain it. They just pick the answer.

[01:05:32]Just pick the answer. So, let me give you another one, and I'm going to ask that same question. So, everybody gets ready.

[01:05:40]And that's one. We are going to look at another question.

[01:05:43]Yes, I've seen another one.

[01:05:46]Maybe another day we'll do stereoisomerism.

[01:05:49]So that I'm not stressing you too much today.

[01:05:52]So, let's go.

[01:05:53]I want somebody to help me with this question.

[01:05:57]Ah, this thing I see it is the same thing, oh.

[01:06:00]>> [snorts] >> I think that year it was the same question.

[01:06:04]I think that year it was the same question. So, you people should wait. I'm looking for question for you.

[01:06:10]Let me see if I can find a question from your past.

[01:06:17]I can find a question from your past question.

[01:06:23]They are two different questions, and I'm looking for it.

[01:06:26]They should be two different ones.

[01:06:30]Okay, we've done this one.

[01:06:32]Let me find another one.

[01:06:37]Okay, I think I've seen this.

[01:06:40]I want to see if you are really understand what I'm doing today. Once you understand it, now we'll solve the class.

[01:06:49]This is another year.

[01:06:53]I think the structure look like house.

[01:06:55]They can ask you to name it, too.

[01:06:58]So, my friend, eh, look at this.

[01:07:05]This is directly proportional. Oh yeah, people online.

[01:07:09]People online, where is How many alkyl group is on this alkene? Where is the alkene? Target the alkene, oh, and give me the answer.

[01:07:18]Clement, oh yeah, Clement. How many alkyl group? Where Anytime I give a question like this, you go to the alkene. The C double bond C. Can you see the C double bond C?

[01:07:28]Yeah, people already getting the question. It's called Jerry. Adebisi, Omolara, Angela Oluwa.

[01:07:35]Some of you are not in my class when I was dealing with line formula. That's why you are having challenge with it.

[01:07:40]Where is the C double bond C? Can you locate the C double bond C? Where is it?

[01:07:44]This C double bond C. Once you first locate that, please, it will make sense.

[01:07:49]Is that okay?

[01:07:50]Now, that's the C double bond C.

[01:07:54]Now, >> [snorts] >> Clement, thank you. I think you have This is the C double bond C. Now, trace this your C.

[01:08:02]Trace it.

[01:08:03]Trace this one. Below and you see 10 to C. Abi? One. Trace this thing. Same thing. This This point is in C. Do you know?

[01:08:10]Another one. Do you get that? Two. Now, if I can trace the next one like this.

[01:08:15]They are tracing that.

[01:08:17]It trace to this C directly.

[01:08:19]Can you see?

[01:08:20]Then, trace this one down. It trace to this C directly. So, how many carbon is here? One, two, three, four. How many carbon I have? Four. Four alkyl group.

[01:08:32]Is that clear, Pastor Femi? Yes.

[01:08:35]Is that clear? Yes.

[01:08:40]Now, this is one of the question. I said something about The more the alkyl group, the more it becomes stable. Should be, you know.

[01:08:47]Now, people, this is for people online.

[01:08:49]In case you are sleeping, don't sleep, oh. People online, I said the more the alkyl group, the more stable it is. And I said when it's stable, will it have lower energy or higher energy? I want you to know it, those one online following me.

[01:09:02]If If your alkene is stable, very, very stable, will it have lower energy or will you have a very high energy?

[01:09:11]Yes, lower energy. Less energy.

[01:09:13]So, a stable alkene will have a low energy. Is that okay? So, in a nutshell, most stable will be the least energy. Say Write that down. Most stable will be the what? The energy.

[01:09:28]The most stable alkane will have the least what? Energy. Write it down, please. Everybody online, write that down. The most stable alkane will have the least energy.

[01:09:41]Everybody, tap tap tap on the like button, please. Tap.

[01:09:45]Tap tap tap.

[01:09:55]Where is that boy? Where is that boy?

[01:09:58]Where is Jabari? Is Jabari on this live?

[01:10:03]Where is Jabari?

[01:10:07]>> [laughter] >> So, let me give you another one maybe short for you.

[01:10:21]Let's give another one.

[01:10:24]Another one.

[01:10:26]This question is coming from uh page one It's called from a past question, page 108.

[01:10:32]Page 108.

[01:10:34]Now, let me give you another one and see what you Let's see what you will do.

[01:10:41]Another question is uh We are going to stop the class on stability. Our next class, I'm going to teach you isomerism.

[01:10:53]Is that Is that clear?

[01:10:56]I don't want them to leave while they are in the class.

[01:11:07]Now, this is another one.

[01:11:10]This is another another one from that question.

[01:11:15]So, everybody, how many alkyl groups attached to this our alkane?

[01:11:26]Three.

[01:11:27]Ah, give me the answer. So, you People online, what's the answer?

[01:11:33]Ah, how many alkyl How many alkyl groups How many alkyl groups is here?

[01:11:38]Oya, tell me. How many alkyl groups?

[01:11:42]Ah, some people are saying three. When I answer the question myself, three three.

[01:11:47]People on physical distance, one per person. Who is saying one now?

[01:11:53]Two.

[01:11:54]Who is saying two?

[01:11:57]Oya, let's see that C. Where is the C double bond C? That's the question for us.

[01:12:02]Everybody on online, where is the C double bond C? Oya, pay attention. Those who are picking two, pay attention. Let me teach you. Where is the C double bond C? This is the C double bond C.

[01:12:16]Can you see the C double bond C?

[01:12:19]Now, if you look at this guy, he's attached to H. He's attached to H. And he's attached down like this, going to this guy. Do you see where it's going to?

[01:12:28]Yeah.

[01:12:30]He's attached to this carbon one. Now, let's take a look at this carbon. Oya, everybody, take a look at this carbon.

[01:12:44]Now, this is C double bond C. This is H.

[01:12:47]This is H. This C is connected to the other C. That's one.

[01:12:51]I mean Now, look at this other C here. That's one connected to a C that is up here. Two.

[01:12:59]I mean It's connected to a C that is here.

[01:13:02]That's making it how many, everybody?

[01:13:04]Three.

[01:13:06]So, it's connected to C one for this one, one. For this one, connected to one, this C that is here.

[01:13:13]I'm connected to this C that is here.

[01:13:16]So, that is making it how many? Three.

[01:13:18]Three alkyl groups.

[01:13:32]Again, Blossom. Blossom, it is here.

[01:13:35]Blossom, have you eaten today?

[01:13:42]Oya, let's finish the question before we leave the live. Nobody should leave until This is compound A.

[01:13:49]Let's say this is compound A.

[01:13:50]This is compound B.

[01:13:52]Now, giving the answer to compound C.

[01:13:55]Let me give you another one.

[01:13:57]Giving one. I'm giving you two.

[01:14:00]And let me give you this one.

[01:14:05]Nobody should leave until we are done.

[01:14:10]I mean I mean you.

[01:14:14]Here is another one.

[01:14:16]Then, lastly, they gave me this.

[01:14:23]>> [snorts] >> I don't think our class is going to go up to 2 hours. Everything will be very short so that you can go and have fun and eat and sleep.

[01:15:02]If you are ready in your house, signify and let me know.

[01:15:19]Oya, this is compound A, B, C and D.

[01:15:26]Oya, let's do that C first. C, everybody, let's go to C.

[01:15:31]C. Now, C is having This guy This [laughter] guy here, how many alkyl groups can you see here?

[01:15:39]Planet, are you with me?

[01:15:41]Planet, oya oya don't worry. Don't say I again.

[01:15:44]Aha, how many alkyl groups can you see here? This is C double bond C. Do you hear me now?

[01:15:50]It's attached straight to one C here, one.

[01:15:53]I mean This This one is not attached straight to it.

[01:15:58]Oya oya, then this one is also attached straight to another C here, then attached straight to hydrogen. So, how many C total? Two C. I mean Because it's two C, that will be two alkyl groups.

[01:16:10]Two alkyl groups.

[01:16:13]Two C means two alkyl groups.

[01:16:16]Now, let's go to the last one, this guy here.

[01:16:24]Everybody, for the last compound, compound D, give me the answer to compound D.

[01:16:30]Compound D, everybody. Compound D.

[01:16:33]Compound D, everybody.

[01:16:36]Oya, I'm waiting for Not compound D D D [laughter] D D.

[01:16:41]D is one. Show me how it is one. This place is carbon, I mean. And this place is your carbon, right? This carbon here is having hydrogen and that and another what? Hydrogen.

[01:16:55]But this carbon here is is is having this hydrogen and is now connected to a carbon that is here.

[01:17:02]There is a carbon here. Can you see a carbon? A carbon is here.

[01:17:09]So, if this is This is having hydrogen and hydrogen, nothing is there. But here, it's having hydrogen that is connected to what? A carbon. So, how many alkyl groups? One. One alkyl group.

[01:17:18]So, my question is this for everybody online and those who have come for the physical class. One two A B C D.

[01:17:28]Which is more stable?

[01:17:31]A. Why is A more stable? Everybody, which is more stable? Option A, option B, option C, option D. Option A. Now, which is more stable? Option A. Why is option A more stable? Because it's having what? Four alkyl groups. Four alkyl groups. So, today we've been able to achieve how to get stability of alkane. And I also taught them how to deal with cyclic compounds. Is that okay? Now, in the next class that we are going to be having, I'm going to be looking at isomerism. Under which I'm going to see stereo isomerism. We are going to look at stereogenic center. There are questions that they give a big structure and they will ask you that what's what is the stereo isomer or the stereogenic center. Is that okay? So, by now, we've been able to clear question on what do you call it? On stability of what? Alkane. If you see questions like this, you you should be able to answer it. I'm going to send you assignments to So, A is more stable and it's going to have the least what? Energy. Do you agree with me?

[01:18:33]A is the most stable and it will have the least what? Energy. So, I'm going to send questions on the group. You people should ensure to do the assignments I'm going to give you. Then, we'll be having our class again tomorrow. Math class will also hold. I'm going to send in information on when math class will hold and when physics class will hold. But for now, we might still be holding our chemistry, then later we'll have our math class.

[01:19:02]So, thank you so much. Do you have question for me?

[01:19:05]Do you enjoy today's class? W Fun Guy.

[01:19:10]>> [applause and cheering] >> Celebrate Fun Guy. It's not easy.

[01:19:19]Tap tap tap tap. Where is Jabari?

[01:19:24]Jabari, you know You know maybe I don't want to leave. Oh yeah, maybe I don't want to leave. Oh yeah, thank you so much for today. So, we are going to see in our next class tomorrow. Thank you so much. Woo!

[01:19:39]Let's go to the bathroom.

[01:19:41]Take it easy. Wait, wait.

[01:19:48]Yes, yes. I appreciate you great man.

[01:19:50]It's not easy.

[01:19:55]I don't think you shout too much today.

[01:19:58]I'm good.

[01:20:00]Did you enjoy the class?

[01:20:03]Yes.

[01:20:05]I enjoyed the class a lot.

[01:20:56]I think you can guide me tonight.

[01:21:02]Guide me tonight.

[01:21:05]Uh So, we have to do anything except if you want to upload your video.