Unimolecular Nucleophilic Substitution - Ibunshikyuukakuchikan

Japanese: 一分子求核置換 - いちぶんしきゅうかくちかん
Unimolecular Nucleophilic Substitution - Ibunshikyuukakuchikan

...Optical active substances are also racemized. According to the Hughes and Ingold diagram, this reaction pathway is a unimolecular nucleophilic substitution (abbreviated as S N 1), and the rate-determining step is the formation of a carbocation intermediate with a three-coordinate planar structure. The rate of the S N 1 reaction is determined by the stability of the carbocation formed in the rate-determining step.

*Some of the terminology that refers to "unimolecular nucleophilic substitution" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…また光学活性物質はラセミ化される。ヒューズおよびインゴルドの図式によるとこの反応経路は一分子求核置換unimolecular nucleophilic substitution(SN1と略記)であり,律速段階は三配位平面構造をもつ反応中間体カルボカチオンの生成である。SN1反応の速度は律速段階で生成するカルボカチオンの安定性によって決まる。…

※「一分子求核置換」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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