Tertiary alkyl halides are practically inert to substitution by `S N^2` mechanism because of

Options

A. insolubility
B. instability
C. inductive effect
D. steric hindrance

Answer

D

Explanation

In `S_N2` mechanism, the attack of nucleophile occurs from the back side of the `alpha`carbon. So, the presence of bulky group hinders the approach of nucleophile making the reaction difficult to occur.