Organic Chemistry (8th Edition)
Organic Chemistry (8th Edition)
8th Edition
ISBN: 9780134042282
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Chapter 20, Problem 65P
Interpretation Introduction

Interpretation:

The percentage of αD-glucose and βD-glucose present at equilibrium is to be calculated.

Concept Introduction:

Specific rotation of mixture at equilibrium is calculated by the formula,

S=(Sα×x)+(Sβ×(1x))

Where,

  • S is the specific rotation of mixture at equilibrium.
  • Sα is the specific rotation of αD-glucose.
  • Sβ is the specific rotation of βD-glucose.
  • x is the fraction of αD-glucose present in a mixture.
  • 1x is the fraction of βD-glucose present in a mixture.

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Calculate the percentages of α-d-glucose and b-d-glucose present at equilibrium from the specific rotations of a-d-glucose, β-d-glucose, and the equilibrium mixture. Compare your values with those given in Section 20.10. (Hint: The specific rotation of the mixture equals the specific rotation of α-d-glucose times the fraction of glucose present in the a-form plus the specific rotation of β-d-glucose times the fraction of glucose present in the β-form.)
Raffinose is a trisaccharide found in whole grains. What is the correct description of the glycosidic linkage(s) in raffinose?
Iis D-glucose capable of forming mutarotation in solid state?

Chapter 20 Solutions

Organic Chemistry (8th Edition)

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