...A carbocation with a charged carbon atom with a coordination number of 4 or 5 is defined as a carbonium ion, and a carbocation with a charged carbon atom with a coordination number of 3 is defined as a carbenium ion. This definition was proposed by American G. Olah in 1972, and is now often followed. Therefore, for example, the t -butyl cation (Figure 1) and triphenylmethyl cation (Figure 2), which were previously called carbonium ions, are named trimethylmethylcarbenium ion and triphenylmethylcarbenium ion, respectively. ... *Some of the terminology that mentions "Olah, G." is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…配位数4または5の荷電炭素原子を有するカルボカチオンをカルボニウムイオンcarbonium ion,配位数3の荷電炭素原子を有するカルボカチオンをカルベニウムイオンcarbenium ionと定義する。この定義は1972年アメリカのオラーG.Olahにより提唱され,現在ではこの定義に従う場合が多い。したがって,たとえば,従来カルボニウムイオンと呼ばれていたt‐ブチルカチオン(図1)やトリフェニルメチルカチオン(図2)は,それぞれトリメチルメチルカルベニウムイオン,トリフェニルメチルカルベニウムイオンと命名される。… ※「Olah,G.」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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