作者bluemagpie (贞心相廷)
看板Chemistry
标题[学习] 化学问题请教大家
时间Tue Nov 16 00:08:22 2010
1.Which of the species below is less basic than acetylide?
(A)CH3Li (B)CH3ONa (C)NaOH (D)both B and C (E)all of the above
答案是D针对这一提实在没有头绪为什麽是这样
2.Which of the following is closest to the C-O-C bond angle in CH3-O-CH3?
(A)180 (B)120 (C)109.5 (D)90 (E)160
答案是C
可是我的想法是氧上不是会有两对孤对电子应该会压迫到键角使其小於109.5
导致键角接近约90
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◆ From: 125.231.100.113
1F：→ lancer1668:2. lp的斥力不至於强到可以把键角挤到90 11/16 00:17
2F：→ chemrecluse:1.酸性大小CH3OH > H2O > C2H2 > CH4 11/16 01:04
3F：→ chemrecluse:题目是问其共轭硷~所以次序颠倒 11/16 01:05