Question

Explain the mechanism of nucleophilic substitution reaction in haloalkanes with an example.

Hint:

SN1 is favored in polar protic solvents, while SN2 is preferred in polar aprotic solvents.

Answer 1

Step 1: Types of Nucleophilic Substitution 1. SN1 Mechanism (Unimolecular)
- Two-step process involving a carbocation intermediate. 2. SN2 Mechanism (Bimolecular)
- One-step reaction with a transition state. 

Step 2: Example - Hydrolysis of Methyl Bromide

\[ CH_3Br + OH^- \rightarrow CH_3OH + Br^- \]