Explanation D-glucitol is chiral, so it is optically active But D-galactitol is a meso compound–with a plane of symmetry and hence optically unactive. The reactions are:

Organic Chemistry

9th Edition

ISBN: 9781305080485

Author: John E. McMurry

Publisher: Cengage Learning

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Concept explainers

Carbohydrates

Carbohydrates are the organic compounds that are obtained in foods and living matters in the shape of sugars, cellulose, and starch. The general formula of carbohydrates is Cn(H2O)2. The ratio of H and O present in carbohydrates is identical to water.

Starch

Starch is a polysaccharide carbohydrate that belongs to the category of polysaccharide carbohydrates.

Mutarotation

The rotation of a particular structure of the chiral compound because of the epimerization is called mutarotation. It is the repercussion of the ring chain tautomerism. In terms of glucose, this can be defined as the modification in the equilibrium of th…

L Sugar

A chemical compound that is represented with a molecular formula C6H12O6 is called L-(-) sugar. At the carbon’s 5th position, the hydroxyl group is placed to the compound’s left and therefore the sugar is represented as L(-)-sugar. It is capable of rotat…

Question

Chapter 25.6, Problem 17P

Interpretation Introduction

Interpretation:

To predict the reduction of d-glucose leads to an optically active alditol (d-glucitol), whereas reduction of d-galactose leads to an optically inactive alditol.

Expert Solution & Answer

Chapter 25 Solutions

Organic Chemistry

Ch. 25.1 - Prob. 1P Ch. 25.2 - Prob. 2P Ch. 25.2 - Prob. 3P Ch. 25.2 - Prob. 4P Ch. 25.2 - Prob. 5P Ch. 25.3 - Prob. 6P Ch. 25.3 - Prob. 7P Ch. 25.4 - Prob. 8P Ch. 25.4 - Prob. 9P Ch. 25.4 - Prob. 10P

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