Pharmjoe Tutors OAU rewatch Live class on Structural Isomerism

Added: 2026-05-11

[00:00:00]Now who can give me the definition of isomeism? Who can give me the definition of isomeism?

[00:00:11]We have 70 people like online. Now who can give me the definition of isomeism?

[00:00:16]I want to know what isism is. Who can help me with that?

[00:00:23]So not to waste our time. Isomeism it has to do with a phenomenon or situation or condition whereby compounds organic compounds have the same molecular formula.

[00:00:44]So they have same molecular formula.

[00:00:52]We have same molecular formula but different structural formula.

[00:01:09]So molecular formula is the same but structural formula is formula the structural formula is different.

[00:01:26]So I think everybody have put that down.

[00:01:30]We have same molecular formula but different structural what formula. I think that is very very simple.

[00:01:38]That is very very simple. I'm trying to adjust it so that we can have a good angle.

[00:01:50]Please give me a moment. Give me a moment.

[00:02:01]You should be here outside the class.

[00:02:06]I need you to help me align this thing so that you'll be able to see it. You don't need to see that green mark. Okay, let me use a different.

[00:02:16]So, let's go over it again. Let's start from here. Now, isomeism have to do with same molecular formula but different structural formula.

[00:02:28]>> Maybe you should change the marker. So same ink mark but same molecular formula but a different structural formula.

[00:02:46]So molecular formula is the same but the structural formula is different.

[00:02:52]Is that clear?

[00:02:54]So we have two types of isomeism.

[00:03:02]Now everybody write it down. We have two types of isomeism. We have two types of isomeism. We have isomeism is divided into two types. We have isomeism is of two types.

[00:03:18]We have the structural we have the structural isomeism and the other one is called stereo isomeism I said we have two type what are the two types structural isome and the other one is what stereo isomearism you can't capture So maybe from here I'll try to because I want to be clear now. So isomearism is of two types like I said we have structural isomearism and we have stereo isomearism these are the two types that we have now can everybody see it clearly now structural is medicine and steady is can everybody see clearly can everybody see clearly Now can we continue?

[00:04:45]Okay. Now structural isomeism and steady isomeism they are the two types of isomeism.

[00:04:53]Structural isomeism and steady isomeism they are the two types of isomeism.

[00:05:03]So structural isomeism and stereo isomeism there are two types of what is.

[00:05:12]Now under structural isomeism under this structural under structural isomeism we have subtypes under there and what are the subtypes that we have under this one we have one we have um position we have position isomearism these are under what structural is I believe everybody's writing everybody should write everybody should Right.

[00:05:46]At the end of this class, I'm going to expect that you snap your note and send it to me. But some of you are not keeping notes. Now, number two, apart from position isomeism, we have some other types of structural isomeism.

[00:06:06]>> Is that clear?

[00:06:07]>> Yes, sir.

[00:06:08]>> Now, we have what we call chain Or if you don't want to call it chin isome call it another name for chain isome is what skeletal isome it is blurry it is blurry >> is blurry network >> isn't yours One side is blurry.

[00:06:41]>> Yes.

[00:06:43]>> Clear. Yes.

[00:06:45]>> Now we have position is then number two we have chain isomeism. Another name for chain isomeism like I said is skelea isomeism.

[00:07:03]So everybody can see skeleism right.

[00:07:14]Now then number three we have functional group isomeism.

[00:07:23]Functional group isomeism.

[00:07:29]We have functional group isomeism.

[00:07:33]Then number four we have tom.

[00:07:40]Now let's go over it again. Isomeism is divided into two types. What are what?

[00:07:45]Structural isomeism and stereo isomeism.

[00:07:49]Then structural isomeism is of four types. We have position is chain isome.

[00:07:56]If you don't want to call it chain is you can call it what? Skeletal isome.

[00:08:00]Then number three we have functional group isomein. Then number four we have what toin. So these are the types of what? Structural isome.

[00:08:16]Now let's go to the other type here stereo. Can you see the stereo?

[00:08:26]Now under stereo isomeism we have two types here. Even though I've dropped two videos on the two types of isomeism on our YouTube channel and some of you are yet to even watch it. Uh we have two types of schedule isomeism.

[00:08:43]We have one we have um geometric we have geometric isome.

[00:08:52]Number two apart from geometric is what else we have? We have optical isomeism.

[00:09:05]Now these are the two types of what stereo isomeism. Now if you following me online let me ask this this question.

[00:09:11]What are the two types of stereo isomeism? If you are following me those online what are the two types of stereo isomeism? I'm waiting for everybody.

[00:09:36]Yeah, I can see people replying. Yes, good of you. Yeah, it means you all following. Thank you so much. So, we have geometric isomeism and we have en sure you you tap the like button. So, for those of us that are online, please always ensure to tap the like button.

[00:09:54]Thank you so much. We are building our YouTube channel regularly. So en sure you tap on the like button. Thank you so much. Now stud is medicine is of two type. We have isome medicine and we have what? Optical isome medicine. Is that clear? Now from the beginning I'm taking it gently in a lower manner so that everybody can understand clearly.

[00:10:18]Firstly I start isomeism is of two types. Structural isomeism and stereo isomeism. Now under this structural isomeism we have four under it. Under steady isomeism how many do we have under it? Two. So we want to start with this. I believe everybody have this in their notes. Can I clean this up because I have to start with structural isomeism.

[00:10:43]Yes. So I I'll be cleaning this up now.

[00:10:46]Then we'll be starting with structural isomeism. Now let me ask you what type of question do you think you'll be expecting under isomeism? They will ask you that they can ask you that a compound A and compound B are they isoma of each other?

[00:11:06]Those are the question you receive. You say compound A and compound B are they isomer of each other? Or the other type of question you can see is that they will ask you that compound A and compound B what type of isomeism what types of isomeism are they what exhibiting is that okay so those are the two question we want to target in your past question we are going to answer question from last year test question they ask you compound A and compound B they ask you that this compound is it is of any of this compound in your options So that is what we do majorly under isomeism. So they ask you that oh this compound. So how do you know if a compound and another compound are isomer is very simple. Let's start with that to know that a compound or and another compound are isomer. The first thing you must pay attention to is that number one that compound must not bear the same name. That means their structural formula will not be what? the same but they will have something in common. What would they have in common? They must have something in common and that is what their molecular formula. For example, everybody pay attention to this word.

[00:12:28]>> Pay attention to this word. So uh we have CH3 C O H CH CH3 then we have another one CH3 C O H then we have H then C O H then what H then what H now he's not he's cutting this part it a little Yeah, it's okay. Move it. Yeah.

[00:13:05]Now everybody, let's take a look at this question. These two question. Now, if I'm to name it, did they beare the same name? No. Okay. For everybody that is online, please, what's the name of this first compound?

[00:13:22]I said if they ask you questions and they ask you that compound A and compound B are they isomer of each other this is compound A and this is compound B are these two isomer of each other that is what I'm asking you compound A and compound B are the isomer of each other now this one is what 1 2 3 this is propound two but this one is what 1 2 3 what's the name of So this is prop what?

[00:13:51]One O. Propan 2 O and propan one O. Are they having the same name? No. In terms of structure, are they the same in structure? No. Because O is at position number two. Why here? O is in position what? One.

[00:14:08]We've adjusted the camera. Now there's nothing like you don't need to show. So let's build announcements I've just now let's continue.

[00:14:27]So if you look at this structure and this structure they are not bearing the same name. So how will I know if they are isomer their name must be different meaning their structure must be different. Then the next is that their formula must be the same. Now let me see if some people still remember formula.

[00:14:45]Give me the molecular formula of this first compound. What is the molecular formula of this first compound?

[00:14:49]Everybody should write that down.

[00:14:52]I'm waiting for people online. Where are they?

[00:14:56]Give me the molecular formula of this compound.

[00:15:04]Great.

[00:15:06]That means Elijah.

[00:15:12]Give me the give me I'm waiting I'm waiting for the moleular formula for this structure. How will you write it? This is going to be 1 2 3 C3 >> ab hydrogen hydrogen here is 3 + 1 4 + 1 5 >> 8 >> C 7 8 >> I'm seeing somebody writing. Okay. Okay.

[00:15:39]Mhm. 8 >> H8 then how many oxygen is there? One.

[00:15:44]So it is C3 H8 or something. I saw some writing it as C3 H7 O. Now in a best molecular when writing a molecular formula it is best that you put all of them together. So this hydrogen comes here becomes H8 then C3 then O. Is that clear? So if you check this one too.

[00:16:06]Let's check this second one.

[00:16:10]Carbon is how many? 1 2 3. That's C3.

[00:16:14]Abby. Hydrogen is also 3 + 1 4 + 1 5 + 1 6 + 1 7 + 1 8. That makes it what? H8.

[00:16:24]Then how many oxygen do we have here? 1.

[00:16:31]Is that correct? So we have C3 H4 C3 H4.

[00:16:36]They both have the same molecular formula but they don't bear the same name. So if you see a question in your pack and they ask you that this compound is an isomer of which of the following what's your first your first job is to draw the structure of that compound then check it to the other compounds you have. Is that okay? I think I'm going to give you question in your past question.

[00:17:01]Do you bring your passion?

[00:17:03]Nobody got passion.

[00:17:06]I want us to try a question if that is possible.

[00:17:13]Try a question.

[00:17:15]The last year question is what I'm looking for. The last year question I can see.

[00:17:28]>> Okay. The question was asking that which of the following was um Okay, I'm still going to ask you that one. I'm still going to ask you that one. Then addition.

[00:17:40]Sorry, I'm looking for a question we can try. I've seen one but last year they gave them two question on isomeism.

[00:17:54]>> Okay, somebody's asking a question. How is the hydrogen date? We say now let's count now.

[00:18:00]>> Hydrogen 3 >> 4 5 6 7 8. So if you if you write this H7 O if you put this H here becomes H said the camera is blurry is not blurry.

[00:18:20]>> It's from your network actually >> the video quality. They should go to settings. Go to the settings of your phone. Press that button that you said set said there. Then you go to quality.

[00:18:33]>> Then increase the quality.

[00:18:36]Basically is in autoh put it in quality this is that okay? So are we clear on this? Are we clear on the fact that anytime they ask you that compound A and compound B are isoma of each other. What do you do? You will check the park name then you will check their what you check the park name then you check their particular what formula >> we miss the person's question >> so um what's your question is it possible for us to see C3 H8 and C3 H in the same question no it's the same thing now these two guys are the same but it is better to write it this way this is more like a molecular formula than this in I thought you what The molecular formula is in molecular formula. You put all the element together, all the carbon together, all the hydrogen together and all the oxygen together. Do you get that?

[00:19:32]Abby, I ask a question. Sir, can I ask a question? Yes. Ask your question, please. Abi, ask your question. What's your question?

[00:19:49]I'm waiting. No, you people should be fast.

[00:19:55]So again I told you that if they ask you that this compound and this compound are each other what you do is that number one their name must not be the same. Is that clear? If their name is not the same then another thing you check is that their molecular formula are they the same. Once the molecular formula is the same and the name are different then you say the iso mass. Is that clear?

[00:20:15]>> Yes sir.

[00:20:18]>> Oh how do I name the compound? Oh, the reason is that I taught them how to name compound before now, but one of this is I'm going to drop a video on how to name compound. Is that clear?

[00:20:29]>> Yes, sir.

[00:20:32]>> Now, let's continue.

[00:20:36]Don't worry. Page number 26. Page 64.

[00:20:41]Number 26. Somebody said, "Let me open to page 64, number 26." Any question?

[00:20:48]Who is that page 64?

[00:20:51]864 if I not see question everybody write this I want to clean it off please.

[00:20:59]Okay, you not >> I said is or isomearism. I said they will have the same molecular formula but their structural formula will be different.

[00:21:13]That's what I said about is same molecular formula but different what >> okay I've seen your question when we get there we will look at it now under isomeism we already know that we have two types so we are starting with the structural everybody focus we are starting with under isomeism we have two type we are starting with structural isomeism We also have stereo >> isomearism but I want to start with this now. I'm starting with the structural isomeism. Now for the structural isomeism.

[00:22:00]Now for the structural isomeism we have the first one is talking about position position isomeism. Now what happen in position is position isomeism just have to do with position like right in position in position is the differences between the compound is based on the position of the substituent or the functional group.

[00:22:35]Let me go over it again. In position isomeism, the difference between compound A and compound B is based on the what? Position of your functional group or your substituents.

[00:22:54]Let me go over it again. For positional isome or for position isomeism, the difference between compound A and compound B will be because of the differences in the position of the what substituent and what functional group.

[00:23:11]For example, let's go back to this structure.

[00:23:18]Everybody go back to this structure.

[00:23:22]Go back to that structure.

[00:23:25]Okay. Now can you see this compound and this compound everybody? Can you see them clearly? Let me let me write it so that everybody can see.

[00:23:36]You can see.

[00:23:41]Now please take a look at these two compound. You can see that they have the same formula. It is both C3 HO. This is also C3 HO.

[00:23:59]Now pay attention because you are just following me. Now these two compound now they have the same molecular formula.

[00:24:06]Can you see their molecular formula?

[00:24:08]They have the same molecular formula.

[00:24:10]Now but what is different about them is their functional group. Maybe I should just ask you what is the functional group on this compound. Give me the functional group on this compound.

[00:24:23]Oh yeah, I'm waiting for some student to the one. What's the functional group on this compound? What you see there as functional group?

[00:24:35]>> Yes. Why? Thank you. Oh, the functional group here is Yes. Oh, thank you. The functional group is everybody. Thank you. The functional group here is rich. Now I'm student. So I'm number one student. Thank you for being number one student.

[00:24:56]>> Now now next question. What is the position of this O? This is 2 or 1 2 3.

[00:25:03]What the position of this O? Where can we find this O? What's if you name it?

[00:25:07]Where will be position of this O for this compound A? Who will tell me?

[00:25:12]>> There's a question here.

[00:25:14]>> Okay, I'll check it. can just scroll down >> in question and bas our in question number two. Question number two. So this O here is in question number two.

[00:25:35]Now let's look to the compound B. What happened in compound B? Everybody compound >> in compound B where is our O in compound B this is a functional group you can see the O but it's a position number what >> oneh said position number three not because I know what you think you put O here oh is one >> yes >> because I know you said 1 2 this is one 1 2 3 you're thinking this is two then by time you move it here you call it three no if you move your O here you say oh is equation number What? One. If you move it here, you say it's in position number what? Two. When you move it here back, you say no. You say it's in question number one. Is that okay?

[00:26:27]>> C. What is that? Okay. You're looking for substitute. Substitute. I mean, anytime I talk about substitute, I'm talking about chlorine, bromine, iodine.

[00:26:36]That's our substitute. And if I'm talking about functional group O double bond triple bond you know what I'm saying talking about C double bond O H and like that these are functional groups then C R I subs is that okay now So this is in question number two and this one is in question number one.

[00:27:12]This is in question number two and this one is in question number one. I'm not dropping the video. Everybody should stay online. No video is being I won't drop any video. You not stay online. Now this O is in question number two. Why this O is in question number one. So what the difference between this compound and this compound please?

[00:27:32]>> Yes. The difference between compound A and compound B is based composition of their age.

[00:27:43]Now did everybody understand that statement? The difference between compound A and compound B is equation of O is equation number two. O is question number what? One. Now with that simple thing I taught you now everybody go to your last to your past question. OU pass question. But if you are not OU student, I'm going to read that question out. I'm going to read that question out.

[00:28:14]Now I told you CH3 is not a substitute.

[00:28:17]CH3 is this is not a this is 1 2 3. This is not a substitute because probably you're not in our class. We alsent comes as CL B I C ch is me and there's no metal here. This is 1 2 3 now let's continue.

[00:28:47]So my question now I have a question for you. They said question last year question position isomeism. Oh yeah yeah yeah right right it's is last year test question I didn't have it I only have the script so right position isomeism is found in the following compound except >> position isomeism is found in the following compound except Position isome is found in the following compound except so anybody should be here Now pick option A. This is option A.

[00:29:51]This was last for students. This is your last this was last last set test question.

[00:30:04]They said position explaining is found in the following compound except if you an aspirant you are doing positive hearing. You have to know part one majority of questions are questions are part one questions. So you have to be ready. You have to know what they know.

[00:30:35]Then we have CH3, CH2, CH2, NH2.

[00:30:49]Then we have four, we have CH3.

[00:31:00]Oh, I can barely see it through. Stage two.

[00:31:06]>> Oh, I can't see what is here.

[00:31:11]>> Is everybody having this past question?

[00:31:13]Open to that. Last question. Last set.

[00:31:17]Have we seen this question?

[00:31:24]Somebody should go to last the last set and press question and check this question for me. Please be fast ch I'm waiting. No, >> it can't be too.

[00:31:45]Nobody's having it. I can't see option D very well. That's the problem. They said the question is which of the following compound they said positional isome position positional isome is found in the following in the following sets.

[00:32:15]Now firstly do you know that let's observe option A. What do you notice about option A?

[00:32:26]>> When do we say we have a position?

[00:32:29]Anytime we have a substituent or a functional group then we can now move them to different direction.

[00:32:40]Okay. Thank you. CH3 CH2 C triple bond CH3.

[00:32:51]Thank you. Somebody already g me the questions. Now in this case they said position is found in the following. In which of these compound can you find positional isomeism?

[00:33:02]They said position isomeism is found in the following except that mean which of them cannot undergo a position isomeism that's our question which of them cannot under go what we call what position is who can help I saw people picking option D >> why why option D I'm seeing option B they said position ism is found in the following except now number one is there functional group on let's observe it one by one this first option option A is it having a functional group yes the functional group on it is what oh and this O I move it here. This O is in position. This is one to position number two.

[00:34:06]>> If I move it here, it will give me a position isome.

[00:34:10]>> If I move this O here, it will give me another name, right?

[00:34:13]>> So, A can give us a position isome. Why?

[00:34:17]Because the O can be moved and it will give us a different name.

[00:34:24]So, pay attention to the pay attention to the correction. A can give us position isome because the O here can be moved here.

[00:34:34]I mean can we can move to the front or we can move it back to this. It will give us different name. Now let's go to the second one. Let's go to the okay to the second one. What type of functional group do you think is it?

[00:34:50]>> This is CHO. Now >> CHO is what >> I've been seeing people picking a lot of the answer to that question. Now let's this B do you know >> I can move this people born to this place. zero. Mhm.

[00:35:07]>> If if I to name this one now, this is one two one two. This is 1 2 3 4 5. This is >> pent 2 I p 2 I. I can take this triple bond and put it here. If I put a triple bond here, it will become what?

[00:35:27]>> Pentine. So meaning that A and B like A and D can under go what we call what >> it is.

[00:35:36]>> Position is very A and D can undermine.

[00:35:39]Now it now remain between this guy >> and this guy. Now this guy how can I cannot undergo a position isomeism? The reason is that the carbon of the functional group will always remain this way.

[00:36:00]That is why anytime you want to name our canal where do we start naming from? Do you remember where we start naming from?

[00:36:05]Anytime you are naming out can where do we start naming from? We name from the carbon of that mean this guy in question number what? One. This guy will always be in question number what one. I can't move it.

[00:36:20]Please anybody want to ask question? Ask I move. This is your test. This is last test question. I know it will convince a lot of students.

[00:36:29]I want somebody to ask a question.

[00:36:32]Ask a question. Ask a question. Ask a question. Before I move, are you convinced that the answer is how can I understand why B is under medicine? How he's having a triple B? Who is that person?

[00:36:51]Flora. Flora. Pay attention. Can you see this? I can write it as this now. CH3 CH2 C H um yes H I can write as C look at it this compound and this compound I say where is still here look at this guy having triple bond this triple bond can be moved here Yeah. The name of this guy is 1 2 3 4 5 1 2 3 triple bond is in position number two. That makes it pen too high. I can move the triple bond here. If I move it here, it will be in position number one.

[00:37:40]This one will be this one will be pent which is one I what two.

[00:37:53]Now so which other one do you have complain about from this who is what are you my are you do you normally come for the normal physical class because the challenge you're having now is you can't name it properly that's the challenge if you can name properly you won't be challenged but like I said we are still going to have a class probably I'm going to drop video on park. Once you understand IUPAC, then position is will be very very clear.

[00:38:34]Explain why C is not the answer. Okay, thank you. Now, for this C, there's a way we can connect there's a way this guy can look like this.

[00:38:46]There's a way we can move this end and this end can be attached in a separate I can move this end and put it there.

[00:38:54]I don't know if I can do like this. I can say CH3 C attach to what? N H2 then free this place and call it what?

[00:39:05]CH3. I can write it this way. Now I don't know if you know I can write it this way. I can move this NH3 can be moved. The NH3 is like our functional group there. Do you get that question?

[00:39:18]The NH2 is the functional group. It can be moved. I can move it. Can see that it is on the first carbon here. I'm moving it. I can move it down here.

[00:39:31]So I think that is majorly on positional what? Isomeism. In position is medicine it just have to do with two has to do with movement or functional group from or substitute from one carbon to the other. As simple as that.

[00:39:53]So now you're not seeing what I'm doing now.

[00:40:04]This is look at this compound and this compound. See that there's NH2 here. I move the NH2 that was here. I move it on this guy. But that cannot be done on this compound. The alana naming alana you have to start naming from the carbon to the functional group.

[00:40:26]So please option B is our option. What do you call B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B cannot under go position isomeism. So the answer is which of these can under go position isomeism? B cannot under go a position isomeism. Now let's go to the next one.

[00:40:47]Right. The next one apart from position isomeism. The next one is chain isomeism. Somebody should write chain isomeism.

[00:40:59]Chain isomeism.

[00:41:13]Yes. How can most time you always find it at position number one and that is why in this case there's no way we can we can't move this guy to any other place.

[00:41:27]So let's move to the next isomearism.

[00:41:29]Another isomeism we have is a chain isome.

[00:41:37]Yes. Have you heard of chain isome before? I said you don't want to call it a chain isome. You call it a what? A skelea isomeism. A chain isome or you call it a skeleton isome. Now what happen in chain isomeism? In chain isome the difference between the isomers. Right? In chain isome the difference between the isomers.

[00:42:08]In chain isome the difference between the isomers is based on the length on the length of the compounds.

[00:42:25]The difference between the isomers are based on the length of the compounds.

[00:42:31]For example, anybody pay attention to this compound.

[00:42:35]CH3 CH2 CH2 CH2 This is 1 2 3 4 5 1 2 3 4 5 6 Then one. Then look at this one.

[00:42:58]1 2 3 1 2 3 4 5.

[00:43:04]Now let me compare these two compound.

[00:43:08]I want us to compare these two compound.

[00:43:10]Firstly check their molecular formula.

[00:43:18]I need your compound.

[00:43:24]>> Oh yeah. Yeah. Give me the form. Now I told you in chain isome medicine that the difference between the isomers. This is one is this is one is and this is another isomer and I said the difference between the isomer will be based on the length of the chain. But firstly what is the molecular formula of this one? What is the formula of this one? Who can help you with that?

[00:43:48]It's not out.

[00:43:56]Don't worry. Bring it back.

[00:44:10]Here is the molecular formula of this.

[00:44:12]This is 1 2 3. How many carbon now? We have 1 2 3 4 5 6 that's six carbon.

[00:44:21]Then >> how many do we have there? 3 + 2 + 2 + 2 + 2 + 3. That's what C6 is H14.

[00:44:36]Now let's compare. Let's check the second one also. Check the second one.

[00:44:40]This is also carbon carbon carbon. 1 2 3 4 5 6 that are sixes.

[00:44:51]How many hydrogen do we have there? 3 + 3 + 3 + 3 is 6 + 1 7 + 2 9 um 11 14.

[00:45:05]Now let's COMPARE THEM. FIRSTLY, WHEN WE DATE THE isomer number one, I said the formula must be the same. What is mole formula of this guy? C is H14. The second one is also whatever is H14.

[00:45:18]Abby.

[00:45:19]>> Yes.

[00:45:20]>> But so the formula is the same. The next question is that do you know the name?

[00:45:25]Maybe ask people some people are on this um live class and they don't understand how to name compound. I understand. to but if you are my student physical that attend my physical class you shouldn't you shouldn't have issue naming a compound. Now let me ask you this first question. This first compound here what is the name of this first compound?

[00:45:43]Everybody should give me give me the name of this first compound.

[00:45:50]Please exit. Thank you. The name of this one. 1 2 3 4 5 6.

[00:46:11]Then give me the name of the second the second compound. I need the name of the second compound.

[00:46:23]>> Oh yeah.

[00:46:27]>> Two. I'm seeing two metal pentine.

[00:46:30]>> I need the name of the second. The first one is the second one. The name of the second compound.

[00:46:34]>> Two metal.

[00:46:35]>> Two metal. How that 1 2 3 4 5. CH is in position number what? Two. 1 2 3 4 5.

[00:46:44]That makes it two.

[00:46:48]>> What?

[00:46:54]>> Yes, that's correct. Two met. Now let me ask you a question. This first compound is C6 H14. This second one is also C6 H14. They have the same molecular formula but their names are different. This is XA and this is TWO METAL PENTANE. WHAT CAN you say is the difference between these two isomer? Who can tell me what makes these two isomer to be different?

[00:47:25]You know in in the first type of isomeism we did we said the differences is based on the position of the substituent ab NOW WHAT MAKES THE FIRST ISOMEISM I discussed I said the differences between the isomer should be because of the what the the differences in position of our of our functional group in these two case now compound A and compound B what do you think cause their differences >> okay I want to see people talking yes change the chain. Thank you, Janet.

[00:47:56]And your name is Len. Thank you.

[00:48:01]That has to the the straight chain and brand. Okay.

[00:48:08]I want you to observe what the difference between this first one and this second one. They both have C6 H14.

[00:48:14]C6 H14. The length. Thank you. Now come to here. The length or the chain. The length or the chain.

[00:48:23]So why if somebody ask you and come and say these two and this guy and this guy they is of each other you say what? Yes they is of each other. Why? C4 64.

[00:48:35]Second question is that they have different name. The name of this one is what ex? And the name of this one is what two per day and they share the same molecular formula.

[00:48:46]>> So the next question you will see is that what type of isomeism are they exhibiting? So what will be your answer everybody? What type of isome are they exhibiting? Chain isome chain or another name for chain isomeism is what? Skeleleta isomeism.

[00:49:02]Another name for chain isomeism is what?

[00:49:05]Skeleleta isomeism.

[00:49:27]So >> I don't know if now let's continue. So and another thing about this um chain ofism is that it's very tricky in the sense that what type of question can they ask if they can ask you that ex you know ex ask how many chain the length of is 1 2 3 4 5 the length is six but the length of this second one is how many five length is five they CAN ASK THAT HOW MANY type of chain chain and exhale on that go because here the length is six. The next one the length is what? Five. I can make the length four.

[00:50:12]>> I can make it look at this one.

[00:50:16]>> CH3 >> I can say CH3 CH3 is there a black matter? M C 3 C H 1 2 3 4 5 6 No >> no >> 1 2 3 4 I can make it uh make it this way this way.

[00:50:46]shaking, shaking, shaking, shaking.

[00:50:51]Now everyone look at this.

[00:50:59]>> Now this is >> This is also 1 2 3 4 5 6. This is also six. 6.

[00:51:08]1 2 3 4 5 6 7 8 9 10 11 12 13 14 H 14.

[00:51:16]This is H14. 6 is H14. 6 is H14. They are all isomer of each other.

[00:51:22]>> Because they bear the same different name. And what is different about them?

[00:51:25]This is same. This is six. Is the the length is six. Abby.

[00:51:31]>> Yes.

[00:51:31]>> What the length of this one? 1 2 3 4 5.

[00:51:34]The length is what? Five. What's the length of this one? Everybody who should somebody should confirm what is the length of it's getting blurry. It's not blurry. What's the length of who can the length of this guy length of this last one?

[00:52:02]I'm waiting for people.

[00:52:10]So there's a way to I'm going to give you a method to get your a method. There's a method because if they ask you that how many position is can exit under some I mean how many chain is can ex >> so in this case this guy was six six length in this case was five in this case one was four we can't go less than three but there's a way we can arrange it again is that is that okay and that is why they can ask question based on that so there is a cheat code that we can use to get it. There's a cheat code we can use to get it.

[00:52:55]And what's that formula?

[00:52:58]I gave my student those formula.

[00:53:04]What that formula? Um there's a formula to get your your if they ask you and say how many is can this so so compound give. I want to give you that formula. I'm going to give you that formula. Now calm down.

[00:53:23]But if you have question let me know.

[00:53:33]No, >> you finalize.

[00:54:04]The formula is uh two. Give me that mark. Give me another mark.

[00:54:12]Give me the formula is 2^ n - 4 and this formula is only valid for when n is coming from 4 and from n= 4 to n = 7.

[00:54:36]If a compound has n= 4 to n= 7, you can use this sheet for it. For example, what do I mean by that? Everybody, let's go and explain. This is this act to help you with chain isomeism. How and how do I mean by that? For example, somebody comes to you and say somebody comes to you and say C age 14.

[00:55:01]You know ex how many chain is medicine can he exhibit this thing will give us seven and if I ask some of you to draw that seven now you might not get it and there's a way you to my but there's a formula that can help us this formula can help us for medicine ranging from when n= 4 to n= 7 in this case what is our Anybody?

[00:55:32]>> Uh, six.

[00:55:35]>> Oh yeah. Yeah. Who is saying will you marry me?

[00:55:40]>> Remarkable insight.

[00:55:41]>> Remarkable.

[00:55:46]>> Oh yeah. Please I'm waiting.

[00:55:49]Now this formula 2 n 2 nus 4. Now look at x 14. Now I said use this formula when your number of carbon is from >> to 7. So in this case is six.

[00:56:05]>> So I can say what 2 into what?

[00:56:08]was 6^ 6 - 4 that keeps one plus one.

[00:56:39]2 please rely this 2 n - 4 + 1 >> yes 2 n raised to power 2^ n - 4 + 1 2 power n - 4 + 1 so in this case should be + one here thank you so If I now have if I come here and say 2 6 - 4 give us what? 2 + 1. So this is going to be what? 4 + 1. Sorry, the answer is going to what? Five. Then how many isomer? How many chain is >> five >> can we get from this? C is H14. It's going to give us how many please? Five.

[00:57:29]This is the number of chain is you can get from here.

[00:57:34]So, can you try C5 H12?

[00:57:40]C5 H12.

[00:57:49]>> C5 H12.

[00:58:15]I'm waiting for you.

[00:58:31]I'm waiting. So what is the answer to this one? What is the answer to this one?

[00:58:37]Now we are we are going to stop our class once you are done with the structural in the next class I'm going to give you isomeism probably as a video. So we are about to stop this class. So I think today we've been able to learn two types of isomearism. We have position is and we have what chain what is. So I'm done with position and I'm done with chain. How do we know chain isomeism? In chain is their differences between isomers are based on the what length.

[00:59:09]Why for position differences between isomers are based on position of your functional group or your what substitute. Simple as ABC.

[00:59:21]Okay, I told you to use this formula.

[00:59:23]Now, this says 2^ n + 1. If you put c5, how will you use it?

[00:59:31]>> 12.

[00:59:35]>> You're still not getting there. Oh yeah, that be what?

[00:59:45]>> Is it confused?

[00:59:57]So this is going to be what our n is five that's 2^ 5 - 4 + 1. This is going to make it what? 2^ 1 + 1 is going to p the three.

[01:00:12]>> So that's as clear as that. So let's go to the third type of medicine.

[01:00:20]>> Oh yeah, if you with me which what did I mention as the third type of medicine for those medicine for those who are online.

[01:00:43]Thank you. Those who are now following me. What was the next type of We talk about position.

[01:00:50]>> We talk about chain.

[01:00:54]>> Then now I want to talk about what functional group. This one is easy. I'll just give you one example.

[01:01:00]functional group isomeism.

[01:01:06]We talk about position isomearism.

[01:01:10]We've talked about chain what isomearism.

[01:01:15]Now I want to talk about functional group isome >> question.

[01:01:24]>> Okay.

[01:01:26]is the formula for all functionality.

[01:01:28]>> Is the formula for functionality all functionality >> is the formula for >> Okay. Okay.

[01:01:38]Where is Okay.

[01:01:41]Are you talking about this?

[01:01:44]This formula works for um basically this formula works for aline and what alkine that's this one that have C and what H in for that asking that question and I said that this goes for when N= that your carbon is around four to when carbon is around seven that's for this formula I discussed that under chain what isome is that clear I discussed this under chain isomeism I've discussed position is on functional group what isome so in functional group isome right the difference between is functional group so Let's go here. Somebody in functional group is the difference that will be between the isomers are functional groups. For example, example CH3.

[01:02:56]I want to see you remember how to name.

[01:03:03]Let's look at these two compound.

[01:03:19]finish. You're about to My tattoo is about to finish. I'm managing.

[01:03:25]Oh yeah. Who will tell me firstly let's check the molecular formula in the order? Oh yeah. Everybody on the group give me the molecular formula of this compound. Be fast. CD formula Tito >> Tito make 24 C.

[01:03:58]>> Give me the molecular formula of this compound so that we can go.

[01:04:04]>> I your mom that. How many carbon is here? 1 2 C2. How many hydrogen do we have here? One.

[01:04:14]>> We are not tapping on the light button.

[01:04:18]>> This is H3 H3.

[01:04:19]>> Yes.

[01:04:20]>> That makes it H3 plus H3. That makes it what? H6. Then what do we have there?

[01:04:26]Oxygen. Now let's go to this other one to give me the one that is here also.

[01:04:30]>> C2.

[01:04:31]>> C2. H6 O.

[01:04:35]This is one two >> four carbon. The hydrogen 1 2 3 4 >> 4 5 6 and one oxygen.

[01:04:47]Now what do you notice about the isomer >> is covering this side.

[01:05:02]Now you can see that this guy and this guy have the same what molecular formula.

[01:05:13]NOW THE NEXT QUESTION THEY HAVE THE SAME DO THEY BEAR THE same name? No they don't bear the same who can give you the name of this guy and the name of this guy. Let's start with the first song for those who understand how to name. I thought you have to name a 2. A2. Some people have forgotten. What is the name of this song?

[01:05:40]Okay. I'm see. What is the name of this?

[01:05:46]This one. This one. This one.

[01:05:53]Johnson.

[01:05:54]W.

[01:06:01]Now the name of this can call it Dexil or you call it what? Methtoil methoxil this is it. That's establish this compound is what it but who giving the name of this compound? Everybody on the group, what's the name of this? This is compound A and this is compound B. Give me the name of the compound B, please.

[01:06:35]>> I don't use too big.

[01:06:38]Jesus, >> this one. This one is.

[01:06:53]Now, next question. We are we have we are going to wrap up the class here.

[01:06:57]Next question.

[01:07:03]>> Oh yeah. Next question. What is the difference between these two guys? Even though they have something in common, what's common between them? They have the same formula. C2H C2. But what is the difference between them?

[01:07:18]>> I'm waiting for people online.

[01:07:20]Tap on the like button. Tap on the like button. Who baby lion drop baby lion baby lion baby lion who can tell the difference between these two structure what's different the difference are we saying functional group. Thank you.

[01:07:57]Now, so that is why we can somebody can ask you that what type of isomeism are they exhibiting? What will you get them a functional group isomeism? What do we call it? Functional group isomeism.

[01:08:10]Don't forget today we are able to do isome medicine and say isome is divided into what everybody >> structural is >> structural isome and what >> is medicine >> steady isome.

[01:08:31]So we said isomeism is of two types structural isomeism and what stereois isomeism. Under structural medicine, what do we learn under what we learn under structural medicine?

[01:08:45]>> Oh yeah. Yeah. Please. What do we learn under position medicine? How many types of ice do we have there?

[01:08:49]>> Four.

[01:08:51]>> Somebody should somebody write it out.

[01:08:59]>> Under isome we go from structural isomeism and stereo isomeism. We have not got stereoism. We are not doing it today. We only did structural isomeism.

[01:09:09]Under structural isomeism, what are the types we consider under it?

[01:09:14]>> What are the types you consider under it? We consider position >> position. Who else follow me? What else?

[01:09:24]Apart from position.

[01:09:26]Thank you. Sh. Who is that person?

[01:09:28]Fatima. Fatim.

[01:09:32]What else again? you consider China consider functional group there's one that remain but that one is not always very very jine but one of these days I'm going to talk about it but this is a medicine I'm going to drop the video we might not do life and we might do live >> all right some people did not have better again so let's should we stop Should we stop here?

[01:10:04]>> Yes.

[01:10:07]>> Everybody, where are my children?

[01:10:10]>> Yeah. Yeah.

[01:10:11]>> Tap on the like button. Tap on the like button.

[01:10:13]>> Like and share.

[01:10:14]>> Subscribe. Subscribe. Subscribe.

[01:10:16]>> Subscribe. Like and share.

[01:10:17]>> Who are those people that tapping? They not happy. No. Tap.

[01:10:22]>> Should we stop here? children >> who saying oh yeah tap on the like button everybody tap tap tap tap >> and share >> subscribe like share >> comment who is number one student number one student so our Next class I'm going to take schedule isome medicine in our live class.

[01:10:58]So I'm going to solve question. I'm going to drop question on this position isome medicine. En sure there's somebody that want to enter. Do you know this girl?

[01:11:11]Do you know her?

[01:11:16]>> Do you know this girl? Why some of you are at home? There are some serious students.

[01:11:25]>> Why some people are told there are some student that are already coming for class?

[01:11:40]>> So, let's stop here today. We'll continue in the next class. And the next class I'm going to do. Don't miss it.

[01:11:48]I'll give you the question on structural medicine. Thank you so much.

[01:11:51]>> Thanks for coming.

[01:12:03]>> Giveaway. Okay. In the next class, I'm going to do giveaway. Any student that is asking question, I subscribe.

[01:12:10]>> Who dare you?

[01:12:11]>> I'm going to give you data. If you come to the next class, I'll give you data.

[01:12:16]Drop code. Which one is drop code? Is it class code? In the next listen, I'm going to give you data. Anybody that answering question, you are going to collect. I'm going to give you sub subscribe to your listening. So, I'm going to give you data. So, en sure you come next class is now beautiful.

[01:12:35]>> Who is that? Who is this?

[01:12:38]>> Don't hry me.

[01:12:43]>> Thank you so much. I really love you all.

[01:12:55]>> So, thank you so much.

[01:13:02]Wait.