...For example, the reaction of methyl bromide with hydroxide ion can be given. CH 3 Br + OH - - → CH 3 OH + Br - ... (18) Since the reaction rate is expressed as v = k [CH 3 Br] [OH - ], this type of reaction is a bimolecular nucleophilic substitution (abbreviated as S N 2). Based on this fact and the fact that inversion (Walden inversion) occurs when the substrate is optically active, Hughes ED and Ingold CK proposed a trigonal bipyramidal five-coordinate transition state. ... *Some of the terminology explanations that mention "bimolecular nucleophilic substitution" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…たとえば臭化メチルと水酸化物イオンの反応を例にあげることができる。 CH3Br+OH-―→CH3OH+Br- ……(18) 反応速度がv=k[CH3Br][OH-]で表されるので,この型の反応は二分子求核置換bimolecular nucleophilic substitution(SN2と略記)である。この事実および基質が光学活性のとき反転(ワルデン反転)が起こることからヒューズE.D.HughesおよびインゴルドC.K.Ingoldらは,三角両錐形の五配位遷移状態を提案した。… ※「bimolecular nucleophilic substitution」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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