Chapter 15, Problem 19PP

Interpretation Introduction

Interpretation:

The reason for “primary halides of the type $\text{R}-{\text{OCH}}_{\text{2}}\text{X}$ undergo ${\text{S}}_{\text{N}}\text{1}$ reactions but most of the primary halides do not” is to be proposed, on the basis of resonance.

Concept introduction:

The reactions that proceed through the formation of a carbocation intermediate, followed by the attack of a nucleophile, are known as ${\text{S}}_{\text{N}}\text{1}$ reactions.

The reactivity of compounds in ${\text{S}}_{\text{N}}\text{1}$ reactions increases with an increase in the stability of the carbocation.