Chapter 10, Problem 53P

(a)

Interpretation Introduction

Interpretation:

$\text{E2}$ elimination products of (2S,3S)-2-chloro-3-methylpentane drawn.

Concept Introduction:

An $\text{E2}$ reaction is a concerted, one-step reaction in which the proton and the halide ion are removed in the same step.

A strong base favours an $\text{E2}$ reaction.

A high concentration of a base favours an $\text{E2}$ reaction.

If one of the reactants is charged, an $\text{E2}$ reaction will be favoured by the least polar solvent that will dissolve the reactant. If neither of the reactant is charged an E2 reaction is favoured by the protic polar solvent.

(b)

Interpretation Introduction

Interpretation:

$\text{E2}$ elimination products of (2S,3R)-2-chloro-3-methylpentane drawn.

Concept Introduction:

An $\text{E2}$ reaction is a concerted, one-step reaction in which the proton and the halide ion are removed in the same step.

A strong base favours an $\text{E2}$ reaction.

A high concentration of a base favours an $\text{E2}$ reaction.

If one of the reactants is charged, an $\text{E2}$ reaction will be favoured by the least polar solvent that will dissolve the reactant. If neither of the reactant is charged an E2 reaction is favoured by the protic polar solvent.

(c)

Interpretation Introduction

Interpretation:

$\text{E2}$ elimination products of (2R,3S)-2-chloro-3-methylpentane drawn.

Concept Introduction:

An $\text{E2}$ reaction is a concerted, one-step reaction in which the proton and the halide ion are removed in the same step.

A strong base favours an $\text{E2}$ reaction.

A high concentration of a base favours an $\text{E2}$ reaction.

If one of the reactants is charged, an $\text{E2}$ reaction will be favoured by the least polar solvent that will dissolve the reactant. If neither of the reactant is charged an E2 reaction is favoured by the protic polar solvent.

(d)

Interpretation Introduction

Interpretation:

$\text{E2}$ elimination products of (2R,3R)-2-chloro-3-methylpentane drawn.

Concept Introduction:

An $\text{E2}$ reaction is a concerted, one-step reaction in which the proton and the halide ion are removed in the same step.

A strong base favours an $\text{E2}$ reaction.

A high concentration of a base favours an $\text{E2}$ reaction.

If one of the reactants is charged, an $\text{E2}$ reaction will be favoured by the least polar solvent that will dissolve the reactant. If neither of the reactant is charged an E2 reaction is favoured by the protic polar solvent.

(e)

Interpretation Introduction

Interpretation:

$\text{E2}$ elimination products of 3-chloro-3-ethyl-2,2-dimethylpentane drawn.

Concept Introduction:

An $\text{E2}$ reaction is a concerted, one-step reaction in which the proton and the halide ion are removed in the same step.

A strong base favours an $\text{E2}$ reaction.

A high concentration of a base favours an $\text{E2}$ reaction.

If one of the reactants is charged, an $\text{E2}$ reaction will be favoured by the least polar solvent that will dissolve the reactant. If neither of the reactant is charged an $\text{E2}$ reaction is favoured by the protic polar solvent.