An enantiomerically enriched sample of 2-butanol has an observed optical rotation of 6.7". Enantiomerically pure (S)-(+)-2-butanol has a specific rotation of +13.5. Use this information to answer the following questions. a) What is the optical purity of the mixture? 49.6 b) What is the ratio of the S and R enantiomers in the mixture? 25 You are correct 80 You are correct You are incorrect % Risomer 0,5 c) If the ratio of enantiomers were adjusted to 9:1, what would be the optical purity of the sample? %ee 75 (R) You are correct X%ee in favor of the Sisomer d) What ratio of enantiomers is needed to obtain an optical purity of 99%? 99.5 You are correct % Sisomer, (S):

An enantiomerically enriched sample of 2-butanol has an observed optical rotation of 6.7". Enantiomerically pure (S)-(+)-2-butanol has a specific rotation of +13.5. Use this information to answer the following questions. a) What is the optical purity of the mixture? 49.6 b) What is the ratio of the S and R enantiomers in the mixture? 25 You are correct 80 You are correct You are incorrect % Risomer 0,5 c) If the ratio of enantiomers were adjusted to 9:1, what would be the optical purity of the sample? %ee 75 (R) You are correct X%ee in favor of the Sisomer d) What ratio of enantiomers is needed to obtain an optical purity of 99%? 99.5 You are correct % Sisomer, (S):

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter3: Stereoisomerism And Chirality

Section3.7: Optical Activity—how Chirality Is Detected In The Laboratory

Problem 3.10P

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