問題詳情

49. Which of the following synthetic procedures would be employed most effectively to transform ethanol into ethyl propyl ether?
(A) 1. Ethanol, HBr 2. Mg, ether, then H3O

 3. NaH, then CH3CH2Br
(B) 1. Ethanol, HBr 2. Mg, ether, then HCHO, then H3O

 3. NaH, then CH3CH2Br
(C) 1. Ethanol 2. CH3CH2CH2OH 3. H2SO4, 140 °C
(D) 1. Ethanol, NaH 2. HCHO, then H3O

 3. HBr, then Mg, ether, then CH3CH2CH2Br
(E) 1. Ethanol 2. H2SO4, 180 °C 3. CH3CH2CH2Br

參考答案

答案：B
難度：適中0.666667
統計：A(1),B(8),C(2),D(0),E(0)

用户評論

【菩提】評論

標準答案修正為 B