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
【用戶】菩提
【年級】國三下
【評論內容】標準答案修正為 B