Question

Which one of the following carbocation is most stable?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C


is most stable because $+R$ group present at $p-(oro-)$ position increases the stability of benzyl carbocation and $-R$ group decreases stability. As $-C{H}_3$ is $+R$ group since it provides electron for delocalisation, it will increase the stability of carbocation at ortho and para position whereas $N{O}_2$ is $-R$ group, it will decrease the stability of carbocation.
Hence, c is the correct option.