Chapter 20, Problem 20.86AP

(a)

Interpretation Introduction

Interpretation: The questions based on the diamino acids are to be answered.

Concept introduction: Amino acid is the compound which comprises amino $\left(-{\text{NH}}_{\text{2}}\right)$ group and carboxyl $\left(-\text{COOH}\right)$ functional group.

In an $\text{α}$ amino acid the carboxylic acid $\left(-\text{COOH}\right)$ group and amino $\left(-{\text{NH}}_{\text{2}}\right)$ groups always present on the same carbon atom. That carbon atom should be $\text{α}$-carbon. The general structure of an $\text{α}$ amino acid is represented as,

Figure 1

The Figure 1 represents the basic structure of an $\text{α}$ amino acid.

To determine: The diamino acids among the given diamino acids which are not $\text{α}$-amino acids.

(b)

Interpretation Introduction

To determine: The chiral amino acids among the given diamino acids.