Q. 13.21 - An Introduction to General, Organic, and Biological Chemistry

Question

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

Step-by-Step Solution

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 1 : Introduction

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

Step 2: Explanation part (a)

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

Step 3: Explanation part(b)

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

Step 4: Explanation part(c)

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

Step 5: Explanation part(d)

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