(D) & (L) configuration of above carbohydrate is :

A D-carbohydrate is :

A D-carbohydrate is :

Specify the configuration of the following compounds in D or L designation. (a) Strategy: The sterochemicla descriptor D refers to an arrangement about a centre of chirality that is identical to the three-dimensional arrangement in D-(+)- glyceraldehyde in which the OH group on the chiral centre is on the right in the Fischer projection. Similarly, the other enatiomer of glyceraldehyde, which has _OH group on the chiral centre to the left is given L configuration. For carbohydrates (polyhdroxy aldehydes or ketones) the focus should be on the last chiral carbon (from the top) while for amino acids the focus should be on the chiral carbon carrying the NH_(2) group.

Which has D configuration.

All naturally occurring sugars are found to have the D-configuration. How do you assign D or L configuration for a monosaccharide ? Illustrate with a specific example.