Our instructor literally copied all the givens here with the same sequence and made it an activity for us in naming esters. I am so happy I found this vlog 😂😂
Thank you very much. Carboxylic acid, Sulphonic acid and acid anhydride have higher priority than ester. So please make a video on that one when ester is a prefix (when these above mentioned functional groups are present). It will be very helpful.
I think we can name 14:05 as methyl isobutanoate(I) or methyl isobutyrate (C). edit: thank u sm for this! your lecture videos literally help me during exam szns
16:30 i think is 2-methyl butyl ethanoate NOT 3-methyl butyl ethanoate because when naming a long hydrocarbon chain we need to start from the side where the first substituent is found the closest. Keep up the good work Sir..... and please reply if im wrong
For example 11, why wouldn’t we number the group without oxygen from right to left to but the methyl group on a lower number (2) instead of putting it on 3?
In that example, first we take the part in which the two oxygens are present and then the other part in which oxygens are absent (i.e. the ethyl). Now, in the oxygen containing part, we take and number the longest chain (including the Carbon of ester). It comes out that on the 4th Carbon, chlorine is present as a prefix called chloro and on the 5th Carbon, double bonded oxygen is present. That Carbon+double bonded oxygen is called ketone (i.e. -C=O), which is here being called a prefix. Remember this, that despite being a functional group, the ketone here is being used as prefix, and the prefix for ketone is called 'oxo'. This is because, the functional groups have priority order in which the 1st priority is given to -COOH group, then -SO3H, then acid anhydride and then, 4th comes this Ester. Ketone has lower priority among these and that's why when a lower priority group (here Ketone) is attached to a higher priority group (here ester), then it is used as a prefix. I recommend you to remember the priority order of functional groups. Now coming to the prefix, they are written according their alphabetical order. So, here it is 4-Chloro-5-oxo ('C' comes before 'O'), NOT 5-oxo-4-chloro. Therefore, the name Ethyl 4-Chloro-5-oxo heptanoate. Hope this helps!
LOL yeah you're right! because the methyl couldn't be attached to the carbonyl group because it would make it a carbanion, and if the methyl was on the 3rd carbon it would be butanoate XD i guess just for clarification. That was good though LOL
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Our instructor literally copied all the givens here with the same sequence and made it an activity for us in naming esters. I am so happy I found this vlog 😂😂
🤭🤣
Gotta play this at 1.75x
Try 4x
Playing it on x2 already
This speed looks normal in video
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I just wanted to revise the naming of esters and it was a good quick revision
Really helped me
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Thank you very much.
Carboxylic acid, Sulphonic acid and acid anhydride have higher priority than ester. So please make a video on that one when ester is a prefix (when these above mentioned functional groups are present). It will be very helpful.
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Bro at 21:12 ketonic group takes precedence over halogen in the prefix naming
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Well then, I assume I'll perfect my quiz tomorrow for naming esters. Thanks a lot.
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Good video. Can you do one on just amides?
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I think we can name 14:05 as methyl isobutanoate(I) or methyl isobutyrate (C).
edit: thank u sm for this! your lecture videos literally help me during exam szns
No isobutanoate would be a common name here we are doing iupac nomenclature
Thanks for the explanations __from far city 😊
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16:30
i think is 2-methyl butyl ethanoate NOT 3-methyl butyl ethanoate
because when naming a long hydrocarbon chain we need to start from the side where the first substituent is found the closest.
Keep up the good work Sir..... and please reply if im wrong
The butyl chain is numbered as carbon 1 being the one attached to the oxygen.
@@rwayle Thanks! Cause I've also wondered that
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15:30 would it not be ethyl-3-methyl butanoate? Would need to separate the ethyl and the number 3 with a hyphen , no?
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For example 11, why wouldn’t we number the group without oxygen from right to left to but the methyl group on a lower number (2) instead of putting it on 3?
if you're talking about 15:25 then I've got the same problem
the exact reason i came to the comment section
because the ester takes priority? you number the carbons going away from the ester. thus 3rd carbon and not the 2nd.
Very good teaching
Hi!
At 8:39, should't you go after which alphabet that comes first as well?
So instead of pentyl butanoate, should't it be butyl pentanoat?
No, the alphabetical rule only applies to the substituents. The main parent name should always be at the end.
at 8:29 shouldn't it be pentanyl butanoate because you replace the "e" part only?
Thankful as always🙏
I have a question about the one at 4:30 -- Why is it Butyl Propanoate and not Propyl Butanoate? Is it because the longer chain's name has to go first?
Also: Can 14:15 also be named Methyl isobutanoate?
Exactly that's what I was thinking it doesnt follow the pattern of the other examples.
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Thanks from jee aspirant
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how you can know where to devid the molecular to part that contain ester group and ather doesn't contain .
In the naming of 3-methy butyl ethanoate,according to numbering possibility is 2 -methyl in the right handside?
I think so bro...
No, FG gets the priority and the carbon just after oxygen is counted the first.
Awesome
Thank you very much 👍
19:57 can someone explain this part
In that example, first we take the part in which the two oxygens are present and then the other part in which oxygens are absent (i.e. the ethyl). Now, in the oxygen containing part, we take and number the longest chain (including the Carbon of ester). It comes out that on the 4th Carbon, chlorine is present as a prefix called chloro and on the 5th Carbon, double bonded oxygen is present. That Carbon+double bonded oxygen is called ketone (i.e. -C=O), which is here being called a prefix. Remember this, that despite being a functional group, the ketone here is being used as prefix, and the prefix for ketone is called 'oxo'. This is because, the functional groups have priority order in which the 1st priority is given to -COOH group, then -SO3H, then acid anhydride and then, 4th comes this Ester. Ketone has lower priority among these and that's why when a lower priority group (here Ketone) is attached to a higher priority group (here ester), then it is used as a prefix. I recommend you to remember the priority order of functional groups.
Now coming to the prefix, they are written according their alphabetical order. So, here it is 4-Chloro-5-oxo ('C' comes before 'O'), NOT 5-oxo-4-chloro. Therefore, the name Ethyl 4-Chloro-5-oxo heptanoate. Hope this helps!
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14:17 why isn’t it methyl methylpropanoate? Why does the 2 need to be put in there if there’s nowhere else for the methyl to go?
I think you forgot to count the carbon atom from the double bonded oxygen
There's a 2 because the methyl is attached to the second carbon...
LOL yeah you're right! because the methyl couldn't be attached to the carbonyl group because it would make it a carbanion, and if the methyl was on the 3rd carbon it would be butanoate XD i guess just for clarification. That was good though LOL
Great video, Thanks!
When is carboxylate used while naming ester !
Please tell