Organic Chemistry (8th Edition)

Published by Pearson
ISBN 10: 0321768418
ISBN 13: 978-0-32176-841-4

Chapter 5 - Stereochemistry - Problems - Page 192: Problem 5-12

Answer

The percent e.e. is 33.3%. The ratio of S to R is 2:1, which is same as 66.6:33.3. The e.e. is the difference between the two percentages, 66.6-33.3=33.3=e.e.

Work Step by Step

Specific rotation is equal to rotation of pure enantiomer x e.e. The rotation of pure (+)-butan-2-ol is 13.5 degrees. 13.5x33.3%=4.4955 degrees.
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