Chapter 12, Problem 64DSP

Interpretation Introduction

Interpretation:

For the rate-determining step, the most reasonable choice in the given reaction is to be determined.

Concept introduction:

A positive value of reaction constant indicates that the transition state has a more negative charge than the reactant.

A negative value of reaction constant indicates that the transition state has more positive charge than the reactant.

Nucleophilic substitution reactions proceed via an addition-elimination mechanism or elimination-addition mechanism.

In an addition-elimination mechanism, the nucleophile adds to the reactant in the first step and the leaving group departs in the second step.

The rate determining step is the addition step.