試題詳解

7.(S)(+)-Butanol shows a specific rotation at +13.52° . What is the ratio of (S)(+)-Butanol and (R)(-)-butanol when the measured rotation equals to +6.76° ?
(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