EBK FOUNDATIONS OF COLLEGE CHEMISTRY
EBK FOUNDATIONS OF COLLEGE CHEMISTRY
15th Edition
ISBN: 9781118930144
Author: Willard
Publisher: JOHN WILEY+SONS INC.
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Chapter 20, Problem 8RQE
Interpretation Introduction

Interpretation:

Structural formula for cyclic form for ribose, glucose, fructose, and galactose has to be drawn.

Concept Introduction:

Simplest carbohydrates are known as monosaccharides.  They contain three to six carbons generally in a chain form with a carbonyl group present in the terminal or the adjacent carbon atom from the terminal.  Monosaccharides contains only one sugar unit.

Monosaccharides can be drawn in a linear style.  Here, the hydroxyl groups are present on the each carbon atom.  Open-chain form of monosaccharide is drawn by placing the hydroxyl groups on right or left considering the chiral center.

Monosaccharide can be expressed in a cyclic form.  In case of an aldohexose, the hydroxyl group present on the C5 carbon atom reacts with the carbonyl group present in C1 carbon atom resulting in formation of a six-membered ring.  Procedure to be followed for obtaining cyclic structure are given as follows.

  • Carbon skeleton has to be rotated to 90°.  While rotating, the groups that are present on the right side ends up below after rotation.
  • Chain has to be twisted in order to put the hydroxyl group closer to the carbonyl group of aldehyde.  The CH2OH group present on C5 is drawn up.
  • The OH group on the C5 carbon atom reacts with the aldehyde carbonyl resulting in formation of six-membered ring that has a new chiral center.  Considering the orientation of OH group that is present on the new chiral center that is formed, two isomers are possible.

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Chapter 20 Solutions

EBK FOUNDATIONS OF COLLEGE CHEMISTRY

Ch. 20 - Prob. 4RQECh. 20 - Prob. 5RQECh. 20 - Prob. 6RQECh. 20 - Prob. 7RQECh. 20 - Prob. 8RQECh. 20 - Prob. 9RQECh. 20 - Prob. 10RQECh. 20 - Prob. 11RQECh. 20 - Prob. 12RQECh. 20 - Prob. 13RQECh. 20 - Prob. 14RQECh. 20 - Prob. 15RQECh. 20 - Prob. 16RQECh. 20 - Prob. 17RQECh. 20 - Prob. 18RQECh. 20 - Prob. 19RQECh. 20 - Prob. 20RQECh. 20 - Prob. 21RQECh. 20 - Prob. 22RQECh. 20 - Prob. 23RQECh. 20 - Prob. 24RQECh. 20 - Prob. 25RQECh. 20 - Prob. 26RQECh. 20 - Prob. 27RQECh. 20 - Prob. 28RQECh. 20 - Prob. 29RQECh. 20 - Prob. 30RQECh. 20 - Prob. 31RQECh. 20 - Prob. 32RQECh. 20 - Prob. 33RQECh. 20 - Prob. 34RQECh. 20 - Prob. 35RQECh. 20 - Prob. 36RQECh. 20 - Prob. 37RQECh. 20 - Prob. 38RQECh. 20 - Prob. 39RQECh. 20 - Prob. 40RQECh. 20 - Prob. 41RQECh. 20 - Prob. 42RQECh. 20 - Prob. 43RQECh. 20 - Prob. 44RQECh. 20 - Prob. 45RQECh. 20 - Prob. 46RQECh. 20 - Prob. 47RQECh. 20 - Prob. 48RQECh. 20 - Prob. 49RQECh. 20 - Prob. 50RQECh. 20 - Prob. 51RQECh. 20 - Prob. 52RQECh. 20 - Prob. 53RQECh. 20 - Prob. 54RQECh. 20 - Prob. 55RQECh. 20 - Prob. 56RQECh. 20 - Prob. 57RQECh. 20 - Prob. 58RQECh. 20 - Prob. 59RQECh. 20 - Prob. 60RQECh. 20 - Prob. 61RQECh. 20 - Prob. 62RQECh. 20 - Prob. 63RQECh. 20 - Prob. 64RQECh. 20 - Prob. 65RQECh. 20 - Prob. 66RQECh. 20 - Prob. 67RQECh. 20 - Prob. 68RQECh. 20 - Prob. 69RQECh. 20 - Prob. 70RQECh. 20 - Prob. 71RQECh. 20 - Prob. 72RQECh. 20 - Prob. 73RQECh. 20 - Prob. 74RQECh. 20 - Prob. 75RQECh. 20 - Prob. 76RQECh. 20 - Prob. 77RQECh. 20 - Prob. 78RQECh. 20 - Prob. 79RQECh. 20 - Prob. 80RQE
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