Enantiomerically pure (R)-(1)-2-methyl-1,2-butanediol has a specific rotation [a] 20 D 5

Chapter 6, Problem 6.42

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Enantiomerically pure (R)-(1)-2-methyl-1,2-butanediol has a specific rotation [a] 20 D 5 19.3 degrees mL g1 dm1 in chloroform solution. OH Me OH (R)-(+)-2-methyl-1,2-butanediol (a) What is the EE of a mixture of (1)- and (2)-2-methyl1,2-butanediol that has an apparent specific rotation of 26.3 degrees mL g1 dm1 under the same conditions? (b) What percentage of each enantiomer is present in the mixture?

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