1ok sri i thought a bit today , yes carbanions do undergo rearrangement
why cant we have rearrangement in carboanions like we have in carocations???
is it due to the face dat -I effect increses.........so the species become more destablised???
n why doesnt rearrangement occur in free radicals????
plz reply in detail n fast
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23 Answers
11thanks and i will assure u i will try all ur questions in chemistry section for rest i am little weak
1:P . Well nice suggestion bro . lekin mere sabhi Q's koi bhi nahi , try karta . I used to give q's now I've stopped. a bit disheartened. never mind. Ill post it as a new topic. :)
1hey srinath it is my humble request to make it as another as ther is a lack of good questions in chemistry section and let other people doing it and i am assuring u that if no- body does the problem i will do it for u
i am not doing it because it is not a doubt of yours but still i will do it for u take some time and let others trying it
1it's one da. try answering. why anew topic let's start a sub topic. problme kya ahi ?? uttar nahi badlega na?
1I'd love to look at the probable mechanism for this . guys , esp by . gagar.iitk
2-bromopentanone to cyclobutanecarboxylic acid.
please try.
1NON PLANAR SPECIES DON'T UNDERGO REARRANGEMENT
i am not including sigmatropic rxn as they have a very strong effect otherwise they dont
1dude...even i got logics sayin it can occur.....but as far as i knw..it doesnt...yy?????????
11Arey yaar. They are giving examples for carbanions showing rearrangement and u r still saying that Carbanions don't rearrange!
1yep guys...even i feel so....but CARBOANIONS DONE REARRANGE>..............reaons anyone???
1in 1st Q carboanion become more destabilised due to inc in +I effect
for 2nd free radicals do rearrange
1there is Favorski and stevens I think which are only to name a few , as far as my memory goes. there are many more I believe but I know only few , so I'm not the right person to be asked :P . But I'm sure of one thing . all Reaction intermediates undergo rearrangement dunno about carbenes , might not be possible , but others like radicals and cationic and anionic carbons do undergo rearrangement.
1guys ........u cannt sat abt -I effect in carboanions...just try moving a H from C2to 23.........and the +1 effect decreses........
so can we explain that by herconjugation effect!!
1even a small amount of -I effect can destabilize free radical
1the q asked by aragorn is very controvertial but i will giv my order
*************a small editing**************
(C6H5)3C.>(C6H5)2CH.>(CH3)3C.>C6H5-CH2.>(CH3)2CH. = CH2=CH-CH2.>CH3-CH2.>CH3.
11Can u also explain the order of stability of free radicals?