碱的体积 Eto n-CAHoOEt ch3 CH, CH-CH2 EtoH 55 n-CaHgBr 90% 10%E2 t-Buo n-C,hooBu-t + Ch2 chocHeCH t-BuOH 44 15 85%E2 t-Bu=(CH3)3C- 可碱的体积增大,不易靠近αC而易靠近β-H, 有利于消除 ⑨DOrganic Chemistry Organic Chemistry Xiamen Xiamen University University 碱的体积 n-C 4 H 9Br Et O - EtOH 55 t-B u O - t-B u O H 44 n-C 4 H 9OEt + n-C 4 H 9OBu - t + CH 3CH 2CH CH 2 CH 3CH 2CH CH 2 90% 15% 85% 10% E2 E2 t-B u = ( C H 3 ) 3 C 碱的体积增大 不易靠近α− C而易靠近β− H 有利于消除