The most stable carbocation is

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

Question

(A) The stability of a carbocation is determined by the electron-donating or electron-withdrawing nature of the substituents attached to the benzene r

Vedclass · Accepted Answer

$p-Methoxybenzyl$ carbocation

Vedclass · Answer

(A) The stability of a carbocation is determined by the electron-donating or electron-withdrawing nature of the substituents attached to the benzene ring.$1$. The $-OCH_3$ group in $p-methoxybenzyl$ carbocation exerts a strong $+M$ (mesomeric) effect,which significantly stabilizes the positive charge through resonance.$2$. The $-CH_3$ group in $p-methylbenzyl$ carbocation provides stability through $+I$ (inductive) effect and hyperconjugation.$3$. The $-NO_2$ group in $p-nitrobenzyl$ carbocation is a strong electron-withdrawing group ($-M$ and $-I$ effects),which destabilizes the carbocation.$4$. The unsubstituted $benzyl$ carbocation has only resonance stabilization from the benzene ring.Comparing these,the $+M$ effect of the $-OCH_3$ group provides the greatest stabilization to the carbocation. Therefore,$p-methoxybenzyl$ carbocation is the most stable.

Similar Questions

Show the homolysis reaction of benzoyl peroxide,$(C_6H_5CO)_2O_2$.

Singlet methylene is....

In the following species, the one which is likely to be the intermediate during benzoin condensation of benzaldehyde is

$(C_6H_5COO)_2$ $\xrightarrow{hv} 2[X] + 2CO_2$ $\xrightarrow{} 2C_6H_5^\bullet + 2CO_2$
Consider the above reaction and identify the intermediate '$X$'.

The orbital picture of a singlet carbene $(:CH_2)$ can be drawn as:

Vedclass Test Series

Exam Paper Generator

Online Exam Module