Chapter 14, Problem 14.48AP

Interpretation Introduction

Interpretation:

The labels D and L are assigned to monosaccharide that has three chiral centers has to be explained.

Concept Introduction:

A carbon atom that is bonded to four different groups is known as a chiral carbon atom.  This can rotate the plane polarized light.  D- and L- isomers of monosaccharide can be identified by looking into the chiral center that is farther from the carbonyl group.  In a Fischer projection, if the $\text{OH}$ group is present on the right side in the chiral center that is farthest from the carbonyl group means it is a D monosaccharide and if the $\text{OH}$ group is present on the left side means it is a L monosaccharide.