Chapter 4, Problem 4.58P

Interpretation Introduction

Interpretation:

The distinct structures of mannoheptulose are to be classified.

Concept introduction:

Constitutionals isomers are compounds that have the same molecular formula but different arrangement of the atoms. The arrangement of the atoms is different for constitutional isomers. We can decide whether two molecules are constitutional isomers by counting the total number of atoms in both molecules and identifying the arrangement of the atoms. Monosaccharides provide many examples of constitutional isomers. These isomers are differed by the location of the carbonyl group ($\text{C = O}$). In aldoheptose, the carbonyl group involves a terminal carbon, which is a characteristic of an aldehyde group, and in ketoheptose, it involves an internal carbon, which is a characteristic of a ketone group.