Chapter 4, Problem 4.68P

Interpretation Introduction

Interpretation:

The more stable form of glucose out of, $\text{β-D-glucopyranose}$ or $\text{β-D-glucofuranose}$, is to be identified.

Concept introduction:

Glucose can exist in two ring forms - five membered ring as furanose and six membered ring as pyranose. The pyranose resembles cyclohexane and furanose resembles cyclopentane ring. The cyclohexane has chair conformation, and cyclopentane has envelope conformation. The structure with less strain is more stable than that with greater strain. Cyclohexane is more stable than cyclopentane.