…When heated with sodium in ether, it becomes methylacetylene. Compounds with the general formula R 1 R 2 C=C=CR 3 R 4 (allene being a typical example) are called allene compounds, and this C=C=C bond is specifically called an allene bond. As can be expected from the tetrahedral structure of the carbon atoms, R 1 , R 2 and R 3 , R 4 are not on the same plane, so optical isomers exist. … *Some of the terminology that refers to "allene type compounds" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…エーテル中でナトリウムと熱するとメチルアセチレンになる。 R1R2C=C=CR3R4の一般式で表される化合物(アレンがその代表)をアレン型化合物といい,このC=C=C形の結合をとくにアレン結合という。炭素原子の正四面体構造から考えられるように,R1,R2とR3,R4とは同一平面上にないので光学異性体が存在する。… ※「アレン型化合物」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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