Chapter 17, Problem 17.23E

Interpretation Introduction

Interpretation:

The Fischer projections of any aldotetrose and ketopentose are to be drawn.

Concept introduction:

A sugar can be classified on the basis of number of carbon atoms and can refer as triose, tetrose, pentose and hexose when it contains three, four, five and six carbon atoms respectively. A sugar whether it is aldos or ketos, depends on the presence of the functional group aldehyde or ketone. The prefix $-aldo$ is used for the functional group aldehyde and prefix $-keto$ is used for the functional group ketone.