Chapter 8, Problem 8.71P

Interpretation Introduction

Interpretation:

The mechanism for the given reaction is to be proposed.

Concept introduction:

The ${\text{S}}_{\text{N}}\text{2}$ reaction is a single-step reaction. The incoming nucleophile (base) attacks the carbon that is bonded to the leaving group, with the leaving group breaking off simultaneously with its bond pair. The incoming group must attack the carbon from a direction opposite to the leaving group. The result is generally a single product. An elementary step in which a proton is transferred from the electron-poor site to the electron-rich site and one bond is broken and another is formed simultaneously is called the proton transfer step.