Chapter 5, Problem 5.42AP

Interpretation Introduction

(a)

Interpretation:

The radicals $\cdot \text{CN}$ obtained from the reaction of $\text{H}-\text{CN}$ with initiating ${\left({\text{CH}}_{\text{3}}\right)}_{\text{3}}\text{C}-\text{O}\cdot$ radicals is not a good source of $\cdot \text{CN}$ is be justified.

Concept introduction:

A process of polymerization in which the growth of chain involves free radicals is called free radical polymerization. The process includes three steps; the chain initiation step, the chain propagation step and the chain termination step.

The minimum amount of energy needed to dissociate a bond is called the bond dissociation energy.

Interpretation Introduction

(b)

Interpretation:

The second step of propagation of the free radical addition is energetically unfavorable is to be justified.

Concept introduction:

A process of polymerization in which the growth of chain involves free radicals is called free radical polymerization. The process includes three steps; the chain initiation step, the chain propagation step and the chain termination step.

The minimum amount of energy needed to dissociate a bond is called the bond dissociation energy. The term bond dissociation energy is only used for diatomic species. The covalent bonds have low value of bond dissociation energy.