試題詳解

50. (S) (+)-Butanol shows a specific rotation at +13.52^o . What is the ratio of (S) (+)-butanol and (R) (-)-butanol when the measured rotation equals to +6.76^o ?
(A) (S) : (R) = 4 : 1
(B) (S) : (R) = 2 : 1
(C) (S) : (R) = 1 : 2
(D) (S) : (R) = 1 : 2.5
(E) (S) : (R) = 3 : 1