Question

Identify each of the following as the $\mathrm{D}$or L enantiomer:

Short answer

a) In this example, we have Threose, and since the $\mathrm{OH}$group is on the right side, this structure is D enantiomer.

b) In this example, we have Xylulose, and the $\mathrm{OH}$group is on the right side, which means that this structure is $\mathbf{D}$enantiomer.

c) In this example, we have Mannose, and the penultimate OH group is on the left side, which means that this is L-Mannose (LMannose is the mirror image of D-Mannose).

d) In this example, we have Allose, and the penultimate $\mathrm{OH}$ group is on the right side, which means that this is D - Allose.

Step-by-step solution

Introduction

Carbohydrates are the most abundant class of organic compounds on the planet. Carbohydrates account for over 75% of the dry planet's bulk.

Explanation part (a)

In this problem, we have to identify given structures as $D$or$L$ enantiomers.

Explanation part(b)

In this problem, we have to identify given structures as $D$or $L$ enantiomers.

Explanation part(c)

In this problem, we have to identify given structures as $D$ or $L$enantiomers.

Explanation part(d)

In this problem, we have to identify given structures as $D$ or $L$ enantiomers.