Aldol Addition Reactions, Intramolecular Aldol Condensation Reactions, Retro Aldol & Cross Aldol Rea
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- čas přidán 30. 07. 2024
- This organic chemistry video tutorial provides a basic introduction into the aldol addition reaction, aldol condensation reaction, intramolecular aldol reaction, retro aldol reaction, and the cross aldol reaction. It contains plenty of examples and practice problems as well as the reaction mechanisms.
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@@PriyankPatel-ji4en In india , we learn this in high school
The best video for Aldol Condensation I found on this entire platform
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What happened to the carbon for the final product 14:47?
Wonderful video just asking for clarity!
Yes , there is one carbon missing
Thank you 🥷
Thank you
Retro synthesis is quite interesting
at 14:45, why is there no additional carbon to the right of the double bond in the final products??
He froget to put it there, simple mistake.
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What the reaction of aldol-croton and ester condensation for 2-methyl butanal.
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Good video
Pls does it form two products or one product
thank for your brilliant education.but i think in 14:49 the product have to have 6 carbons . please check it
Not 6 , there should be 5 carbon in total in the final product
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Very useful piece
Thanks but please how are you to locate the alpha and beta positions
Does protonation occur b4 the OH leaves in the condensation part or it leaves as OH? Cus I have been taught it's a bad leaving group and therefore will not leave until it's leaving ability in been improved
it's under basic conditions so the OH can't really be protonated
and the reason it leaves is because the carbanion pushes it out, as it's a stronger nucleophile
cross aldol rea ??
12:22 I thought OH was a bad leaving group. How are you able to get rid of it?
My TA told me that it's because we're in basic conditions, so it's ok if we eliminate the OH. I don't have a better explanation for it, sorry LOL
j c np. Thanks for responding, regardless
I guess he missed the step in which he protonates the OH to water
Formation of the conjugated double bond system gives extra stability to the molecule.....which is the driving force for that elimination.
And like you said OH is a weak leaving group And thus follows E1cb mechanism.
Ch3- is more basic than OH- so here ch3- is a lot more bad leaving group than oH- so less basicity will be good leaving group
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why does the nucleophilic carbon attack the carbonyl instead of the alpha hydrogen?
the carbonyl is the electrophilic carbon in this case, which is why it attacks there.
Why does the H is attacked by the OH- base in the start of the mechanism , is the H acidic? I don’t understand
yes the h is acidic as the resultant intermediate is resonance stabilised
there is one thing that confuses me a lot about aldol condensation reactions, throughout organic chemistry lesson our lecturers taught that OH- is a bad leaving group so we have to hydrogenate it to make it a good leaving group otherwise we cannot make it leave the molecule structure, so i am wondering why in the aldol reactions we do not need to hydrogenate it to separate from the structure? if anyone knows the answer please let me know
hello have you found an answer yet? -a fellow student with the same question
usually we say OH- is a bad leaving group and it can only leave when protonated under acidic conditions. but here a carbanion is formed and as we know carbanion is stronger nucleophile than hydroxide so it will push the hydroxide out of the molecule.
I recommend watching the Khan Academy...this guy here skips crucial steps
Why do we use heat?
so OH and H can be removed to get final product. sorry i just watched or studying so its not definite answer
Alors les PC vous êtes prêts pour les concours ?
W vid
3:13 doesnt make sense at all
💜💜💜
Since I have been watching your video, your explanation on this topic isn’t like the others.
I couldn’t understand the topic even after watching this video countless times, I had to watch other video before coming back here
Not understandable for people who are battling to understand this topic
You're definitely alpha, and this video is beta than almost everything else on the topic 👍