The specific rotation of (S)-carvone (at 20 degrees) is +61. A chemist prepared a mixture of (R)-carvone and its enantiomer, and this mixture had an observed rotation of -55.  (a) What is the specific rotation of (R)-carvone at 20 degrees? (b) What percentage of the mixture is (S)- carvone? Choose from the following options.  1. 90% (S)-carvone and 10% (R) 2. 10% (S)-carvone and 90% (R) 3. 95% (S)-carvone and 5% (R) 4. 5% (S)- carvone and 95% (R)

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
Chapter5: Alkenes: Bonding, Nomenclature, And Properties
Section: Chapter Questions
Problem 5.36P
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The specific rotation of (S)-carvone (at 20 degrees) is +61. A chemist prepared a mixture of (R)-carvone and its enantiomer, and this mixture had an observed rotation of -55. 

(a) What is the specific rotation of (R)-carvone at 20 degrees?

(b) What percentage of the mixture is (S)- carvone? Choose from the following options. 

1. 90% (S)-carvone and 10% (R)

2. 10% (S)-carvone and 90% (R)

3. 95% (S)-carvone and 5% (R)

4. 5% (S)- carvone and 95% (R)

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