Chapter 7, Problem 7.65SP

(a)

Interpretation Introduction

To determine: The alkyl halide that gives $\text{2,4-diphenylpent-2-ene}$ on reaction with $\text{tert-butoxide}$.

Interpretation: The alkyl halide that gives $\text{2,4-diphenylpent-2-ene}$ on reaction with $\text{tert-butoxide}$ is to be identified.

Concept introduction: The elimination reaction is the organic reaction in which two substituents are removed from the organic molecule in one step or two steps. The two mechanisms of the elimination reaction are E1 and E2 mechanism.

The ${\text{S}}_{\text{N}}\text{1}$ reaction is the mechanism of nucleophilic substitution reaction that occurs in two steps. In ${\text{S}}_{\text{N}}\text{2}$ reaction, the nucleophile substitution reaction occurs in which one of the bonds is broken and simultaneously another bond is formed.

In ${\text{S}}_{\text{N}}\text{2}$ $\text{E2}$ elimination reaction, the incoming anion acts as a base not as a nucleophile, removal of proton leads to the formation of alkenes.

(b)

Interpretation Introduction

To determine: The stereo geometry of the alkyl halide $\text{3-bromide-2,4-diphenylpentane}$.

Interpretation: The stereo geometry of the alkyl halide $\text{3-bromide-2,4-diphenylpentane}$ is to be determined.

Concept introduction: The geometric isomerism is shown by an organic compound. The compounds that have two higher priority groups are on the same side of the double bond are represented by Z and the compounds that have two higher priority groups on the different side of the double bond are represented by $\text{E}$.