9.7 Practices

1. Answer the following questions:

a. Refer to the structures of D-sugars in Fig. 9.1e, and draw the structure of L-mannose.

b. D-Mannose is epimer to D-Glucose on which carbon?

c. Draw the β-pyranose form of D-Mannose in both Haworth projection and chair conformation.

d. When D-Mannose is oxidized by nitric acid, an aldaric acid product is obtained. Show the reaction equation with open-chain structures, and determine whether the aldaric acid product is optical active.

2. Show the product.

a.

b.

c.

d.

e.

f.