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huoyan520: 金币+30, 翻译EPI+1, ★★★很有帮助 2012-03-19 09:46:47
爱与雨下: 金币+1 2012-03-24 19:57:14
The steric resistance of catalyzing to form 1,3 - diene phosphonate is small so that conjugated diene-type product was obtained when the No.1 and No.4 carbon atoms have no substituents or branch chains. While the steric resistance of catalyzing to form 1,3 - diene phosphonate is big so that 1,2 - cumulative diene phosphonate was produced when the No.1 and No.4 carbon atoms have substituents or branch chains.
2楼2012-03-18 10:17:39
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