Chapter 23.4, Problem 28LC

Interpretation Introduction

Interpretation: To determine the product that is formed by the combination of carboxylic acid and amine.

Concept Introduction: Carboxylic acids have COOH functional group and amine has ${\text{NH}}_{\text{2}}$ group. During the reaction, the OH from the carboxylic acid group and the hydrogen from the amine group will be eliminated as a water molecule and that results in the formation of the amide bond. When monomers of amides combine they form polyamides.

Answer to Problem 28LC

The product formed is amide and the polymerization product of this reaction is polyamide.

Explanation of Solution

The amide bond between the carboxylic acid and the amine molecule is formed by the elimination of the water molecule. The reaction will be as follows

  

So, the amide formed during this reaction will undergo polymerization. These molecules will add to each other resulting in the formation of polyamides. The general form of polyamides is as follows:

  

Where ‘m’ represents the number of units of the alkyl group and the ‘n’ represents the number of units of the whole molecule.

Examples of polyamide include Nylon which is used as a fabric. The structure of nylon is as follows:

  

This Nylon polymer is a product that is formed by the reaction of carboxylic acid and amine.

Conclusion

Amide is a compound in which the amine is linked with the carbonyl group of the carboxylic group. The loss of water molecules will result in the formation of the amide bond.