Chapter 6, Problem 41DSP

Interpretation Introduction

Interpretation:

A compound that undergoes substitution by ${\text{S}}_{\text{N}}1$ mechanism at the fastest rate is to be determined.

Concept introduction:

For ${\text{S}}_{\text{N}}\text{1}$ reactions, the rate determining step is the formation of the intermediate carbocation.

The order of stability of carbocations is: $\text{primary < secondary < tertiary}$

More stable carbocations are formed faster than less stable carbocations. Thus, tertiary alkyl halides react fastest while primary alkyl halides react slowest for ${\text{S}}_{\text{N}}\text{1}$ reactions