Chapter 9, Problem 9.25P

Interpretation Introduction

Interpretation:

The four bases are to be arranged in descending order with respect to $\text{E2}$ elimination to ${\text{S}}_{\text{N}}\text{2}$ product ratio when they react with isobutyl bromide.

Concept introduction:

The removal of two substituents from a molecule either in one step or in two steps is called an elimination reaction.

The general steps involved in acid catalyzed reaction are as follows:

• First step is the protonation of alcohol group.

• The second step is the removal of ${\text{OH}}_{\text{2}}$ group.

• The third step is the deprotonation.