Question

Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alkyl halides due to :

• A. $\text{The formation of less stable carbonium ion}$
• B. back side attack is hindered
• C. $\text{Longer carbon-halogen bond}$
• D. Both a and b

Answer 1

The correct option is D Both a and b

For $S_{N}2$ back side attack is not possible.
For $S_{N}1$ phenyl carbocation is highly unstable.
Hence they cannot undergo nucleophilic substitution in comparison to alkyl halides.