Which is the most stable cation?

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) To determine the stability of carbocations,we consider resonance,hyperconjugation,and inductive effects.$1$. $C_6H_5-CH_2^+$ is a benzyl carbocati

Vedclass · Accepted Answer

$C_6H_5-CH_2^+$

Vedclass · Answer

(A) To determine the stability of carbocations,we consider resonance,hyperconjugation,and inductive effects.$1$. $C_6H_5-CH_2^+$ is a benzyl carbocation,which is stabilized by resonance with the benzene ring.$2$. $CH_2=CH-CH_2^+$ is an allyl carbocation,which is stabilized by resonance.$3$. $CH_3-CH^+-CH_3$ is a secondary $(2^\circ)$ carbocation,stabilized by hyperconjugation ($6$ $\alpha$-hydrogens).$4$. $HO-CH_2^+$ is stabilized by the $+M$ effect of the oxygen lone pair.Comparing these,the benzyl carbocation $(C_6H_5-CH_2^+)$ is significantly more stable due to extensive delocalization of the positive charge over the entire benzene ring compared to the allyl or secondary carbocation.

Similar Questions

Arrange the following carbocations in decreasing order of their stability:
$\stackrel{+}{C}H_3, (CH_3)_3\stackrel{+}{C}, CH_3\stackrel{+}{C}H_2, (CH_3)_2\stackrel{+}{C}H$

The total number of electrons around the carbon atom of a methyl free radical is:

Which of the following compounds forms the most stable carbocation: $(CH_3)_3C-Br$,$(C_6H_5)_3CBr$,$(C_6H_5)_2CHBr$,and $C_6H_5CH_2Br$?

Which of the following has maximum stability?

Write structures of various carbocations that can be obtained from $2-$methylbutane. Arrange these carbocations in order of increasing stability.

Vedclass Test Series

Exam Paper Generator

Online Exam Module