Q. 36

“Stability of car

Answer :

As we know that the, stability of carbocation can be decided by many effects, like inductive effect, resonance, hyperconjugation etc. And a combined effect leads to the following order of stability of carbocation:


As structure A is having a carbocation, which is primary and allylic carbocation, whereas the carbocation in the structure B has secondary and allylic carbocation.


Hence, structure B is more stable.


(NOTE: As in both cases the allylic carbocation is common, it will not be the deciding factor for stability, hence we will decide the stability by primary and secondary carbocation.


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