Enantiomerically pure (R) ( ) 2 methyl 1,2 butanediol has a specific rotation 20 D 19 3 degrees mL g 1 dm 1 in chloroform solution (a) What is the EE of a mixture of ( ) and ( ) 2 methyl 1,2 butanediol that has an apparent specific rotation of 26 3 degrees mL g 1 dm 1 under the same conditions (b) ...

a b Since the specific rotation of the mixture is negative we know that the ma ...

Enantiomerically pure (R)-(+)-2-methyl-1,2-butanediol has a specific rotation [] 20 D + 19.3 degrees mL g 1 dm

Question:

Enantiomerically pure (R)-(+)-2-methyl-1,2-butanediol has a specific rotation [α]²⁰_D + 19.3 degrees mL g^–1 dm^–1 in chloroform solution. OH Me OH (R)-(+)-2-methyl-1,2-butanediol

(a) What is the EE of a mixture of (+)- and (-)-2-methyl-1,2-butanediol that has an apparent specific rotation of 26.3 degrees mL g^–1 dm^–1 under the same conditions?

(b) What percentage of each enantiomer is present in the mixture?

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