作者bluemagpie (貞心相廷)
看板Chemistry
標題[學習] 化學問題請教大家
時間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針對這一提實在沒有頭緒為什麼是這樣
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會有兩對孤對電子應該會壓迫到鍵角使其小於109.5
導致鍵角接近約90
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 125.231.100.113
1F：→ lancer1668:2. lp的斥力不至於強到可以把鍵角擠到90 11/16 00:17
2F：→ chemrecluse:1.酸性大小CH3OH > H2O > C2H2 > CH4 11/16 01:04
3F：→ chemrecluse:題目是問其共軛鹼~所以次序顛倒 11/16 01:05