Question

Assertion (A): Inversion of configuration is observed in S_N2 reaction.

Reason (R): The reaction proceeds with the formation of carbocation.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

• Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).

• Assertion (A) is true, but Reason (R) is false.

• Assertion (A) is false, but Reason (R) is true.

Answer 1

Assertion (A) is true, but Reason (R) is false.

Explanation:

The S_N2 process is a concerted mechanism in which a pentavalent carbon is produced with half bonds in the transition state but no carbocation is formed. The conformation is inverted due to the nucleophile's attack from the rear.