Organic Chemistry
Organic Chemistry
8th Edition
ISBN: 9781305580350
Author: William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher: Cengage Learning
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Chapter 26, Problem 26.5P
Interpretation Introduction

Interpretation:

The higher melting point between glyceryl trioleate and glyceryl trilinoleate has to be identified.

Concept-Introduction:

Melting point of fatty acids:

  • Increase in length of hydrocarbon chain of a fatty acid and its degree of saturation increases melting point.
  • Fatty acids that pack better way has attractive dispersion force between molecules which increases melting point.
  • Saturated fatty acids pack regular, compact form than unsaturated fatty acid. Due to kink induced by cis double bonds, unsaturated fatty acids are arranged irregular.
  • Therefore, it has low melting point. Hence, unsaturated fatty acid has lower melting point than saturated fatty acid.

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