Question

Tertiary alkyl halides are practically inert to substitution by $S_{N}2$mechanism because.

• A. The carbocation formed is unstable
• B. There is steric hindrance
• C. There is inductive effect
• D. The rate of reaction is faster in $S_{N}2$mechanism

Answer 1

Answer: (B)

There is steric hindrance

Answer 2

In tertiary alkyl halides steric hindrance does not allow substitution by $S_{N}2$mechanism in which the nucleophile attacks on the carbon atom and the reaction takes place in single step.