Chapter 21, Problem 21.63AP

Interpretation Introduction

(a)

Interpretation:

The phthalic anhydride is prepared from the phthalamic acid with the help of curved-arrow notation is to be predicted.

Concept introduction:

Anhydrides are prepared when a carboxylic acid is reacted with a strong dehydrating agent like phosphorus pentoxide. Cyclic anhydrides are formed by two methods. In one method, a dicarboxylic acid is treated with acetic anhydride and in second method, a dicarboxylic acid fuses into cyclic anhydride on heating.

Interpretation Introduction

(b)

Interpretation:

The intermediacy of phthalic anhydride on the basis of double labeling experiment is to be predicted.

Concept introduction:

The hydrolysis is a chemical reaction in which the water molecule breaks the bond between two or more molecules in a compound. The term generally used is for the elimination and substitution reaction in which water molecule act as a nucleophile.

Interpretation Introduction

(c)

Interpretation:

The reason so as to why the formation of phthalic anhydride from phthalamic acid results in a large rate acceleration is to be stated.

Concept introduction:

The hydrolysis is a chemical reaction in which the water molecule breaks the bonds between two or more molecules in a compound. The term is generally used for the elimination and substitution reaction in which water molecule acts as a nucleophile.