AB Sir Nomenclature part 16

Added: 2026-05-12

[00:00:00]next yeah hi our double bond or triple bond in the compound that what we should do aha you are going to write the are you listening first let us see the double bond if it always being present let us say you're having this particular compound let us say you're having this compound let us say okay you're having this tell us so in this case what you find is that get me Thomas Crapper nervous so suppose we are having a double bond here okay this is ch3 this is ch2 this is ch2 this is your nothing but ch2 this one two three four bonds done this is CH 2 and this is your CH 2 we are having a compound letters I wanted to write that in this name of this real Aqaba fine so what do you do should do first say longest chain okay now see one two three four five carburetors this is five now one two three four five six seven items all right listen carefully one two three four five six seven eight oops I said this is a long missing six five nine eight of this allow missing okay okay I take this six carbon atoms along this chain okay fine now what I did it double got CH - that's it exist methylene does it exist double bond CH - does it exist any any prefix is there Oh double bond CH - that is does this what you can say this prefix of the compound whatever you say does it exist I told you are here also that and things means there must be two carbon atoms minimum - minimum two carbon atom must be a mover what is the name of this prefix what should I write when it does not exist what should I write so listen carefully the rule now in case of double bond or triple bond the double bond or triple bond has to be included in the longest string for writing the UPC even if it violates the longest chain rule again I repeat while writing IVC name you have to include the double bond or triple bond in the compound we have in cube pinnacle garnet a triple bond we have been including a compound all right even if it violates the nagas chain rule here you can see violet even say sorry is violating the longest in truth this is the 6,000 items yeah okay agree but you ready the name here the one which goes outside too long listen it's a graphics does this prefix exist and also you see whether it is cisterna by writing that easily what should I write tell you of those prophets some hands your longest chain is not this your longest chain is this so here it's in spite of irrespective of the number of carbon atoms we have to include the double bond or triple bond in the longest in spite of irrespective of even if it is the longest chain rule but we have to consider the double bond or triple bond that is inside the longest chain because that is your functional group all the answer that is your primal cervix here remember this particular point because I give you an example and I've said it to you yeah okay fine now then clearly now you can see this this becomes a graphics so this particular one exists okay and if there is no anomaly suppose by taking this as a longest chain let us say I will be having 1 2 3 4 5 6 7 8 carbon atoms will be there or 7,000 items of the day and in the another change there is no animal living there particularly they saw confusion in that case or timidity that becomes an omission and automatically that will monitor till one comes inside the longest chip but if there is anything such as I give it to you then you need to prefer the this particular chain as long as she not at this one that is double bonded little mutt has to come beneath a large gene because I need to write the name of the prefix which will exist all right clear understood now so this becomes a suffix this becomes if traffic's not retired now next thing is that house number it definitely I have to give a lowest number two this one two three four five if you start numbering from this end gotta say one two three four then it I comes in with particular position for question and if you start from this end then you can contribute position second position which num which which side should be give lowest number did you understand if I come from this end a fourth position if I comes and if I come from the sensor and personal items number one point number two this double bond or triple bond has to be given the lowest number here the double bond written already said it behaves as a functional group it comes under which homologous series yeah this compound comes a trolly means how did if you didn't have any triple bond you have got matter alkynes so i have to give the lowest number to that the next rule and coming to its that always a functional group is given the lowest number I'll come to the next rule okay let me write that ABC me see it second three prefix what is that the first is to time only one is a second to traffic's to e5 no primary traffic's root word blue body spot how many thousand happens file so it is spent now what is primary suffix primary suffixes nothing but first question I got it in so one in or you may not write one also one is not essential like in algebra I have already monix one way now if I write x and y it's understood that what you said your same thing you may or may not if you sir no sir I read right if you say no I not read understood then what will be the name i listening to hi patty or you say - hi what is the difference all right say in this way if a miracle preferred against a double bond or triple bond to say that which were till I do I am do it in this particular manner you are is one more example suppose both the double gone until morning I think that is populated listen carefully if both the double bond and triple bond is present in a given compound then first my point will be lowest number I have to give lowest number with a double bond so I will be counting from that particular side from which the double bond and triple bond get the lowest number now if suppose I need to give a preference that's a double bond triple bond is there and if double bond is getting the lowest number all right then what will I do in that is and give preference to double bond on it and give preference to double bond listen carefully so first double bond and triple bond is there in that case how will I remember it I will number it according to the lowest number no doubt a number it according to Lewis number okay fine now if a preference has to be given to whom I give the first reference I will give preference to double bond first because in EE alphabetical order even then I am widening so first eat then why alphabetical order according to alpha give order first and give preference to in alkene then are the preference to hang them if preference has to be given in that case but considering the lowest number rule lowest number rule cannot be violated all right let me give an example let me give an example to you suppose I get here to the bond and I get headed double god all right clay now rest is ch3 ch2 CH see it here nothing here nothing you'll see you stood right there simple now one chain is there no other branching nothing all right you want a branch I do it here let us put here pro okay let us put it and advance done then he that is further ado I give preference first but I am sacred double bond first and see what happens if I count up the same one two three third version double markups four five six seven if I counter this end one two three four the fourth question that one comes five six seven so if I come from this end listen carefully children now okay let me write under pen another ink it will be better one two three four five six and seven let's see so now shouldn't you see if I found from this end this end if it comes second position I get ie I get second position and I get fourth position the look at second and fourth if I come from this and decide the scientific town then I get third position first is third and next is your fifth which is a lowest definitely this is the lowest definitely this accursed I don't have preference here sir you said I will get the reference but I said the tower violating the verse number Louis never who you already violated or it without rioting so here what I see that if I give an eighth the preference and ie the numbering starts from third and if I give a damn and the Preferences from second so I have to eat preference to lowest number rule first then after that if I win comes rest then it so if it is not then we'll do it accordingly so next something will be from that direction not from this - alright so forget about this numbers now this number c5 so what is the IUPAC name of this compound what is like his namesake it's same thing to start Occidental products second it traffic's it six six slow see this number is not only the sixth floor then primary traffic's is not the rule or the root word is far kept I can write small a capital letter in it now it now primary suffix primary suffix yes what is that first it's a that is I'm by writing after I got everything my number I believe according to verse number one for writing I work together so alphabetically fourth question we get it e and second question pick a date I all right you can see that so what will I write first a - for hey I what is that - I mean for in and - I we got it here now one more thing I'll tell you here here e I'll be removing who say why this is e and this is why I it's not a valid interest rate is run in chemistry a e i o u as the last by example or it in chemistry a e i o u as the last why is the vowel all right for that remember if I said you al al al al al time I said I myself I by L all right whether you noticed me or not I don't know so in this way he has to be removed because E and y both Agabus both are balanced so he has to be removed so here what will I write then II Men that is correct my part now what is our username 600 health for a - I mean six chloro health for e2 and we got that his name in this particular manner alright industry clear understood how great is me for the multiple bonds when it comes how to do it in this manner in to do it the multiple bond returns thank you