Chapter 22, Problem 22.81AP

Interpretation Introduction

(a)

Interpretation:

The structure of the compound A and its nucleophilic atom obtained from the reaction of $2,4-\text{pentanedione}$ with a base $\text{NaH}$ is to be stated.

Concept introduction:

The electron-rich chemical species that contains negative charge or lone pair of electrons are known as a nucleophile. The sodium hydride is a strong base. It abstracts a proton from the stronger acidic compound and forms its sodium salt. Hydrogen gas is evolved in this process.

Interpretation Introduction

(b)

Interpretation:

The structures of three isomeric compounds with formula ${\text{C}}_{\text{6}}{\text{H}}_{\text{10}}{\text{O}}_{\text{2}}$, B, C, and D obtained from the reaction of the compound A with ${\text{CH}}_{\text{3}}\text{I}$ are to be drawn.

Concept introduction:

The enolate ions are derived from enol in which anionic charge is delocalized over the carbon and the oxygen atom. When a base abstracts a proton from a $\alpha$ carbon of a carbonyl compound it results in the formation of an enolate ion.