...There are two ways in which this bond can be cleaved (and formed). When the cleavage of the bond A:B, which is formed by atoms A and B sharing two electrons, occurs symmetrically, with A and B each gaining one electron, that is, when the cleavage proceeds as follows: A:B―→A・+・B ……(1), this type is called homolytic cleavage. The resulting A・ and ・B (including when they consist of a single atom) have an odd number of valence electrons, including the unpaired electron, and are called radicals (also called free radicals or free radicals). … *Some of the terminology explanations that mention "equal cleavage" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…この結合の開裂(および生成)には二つの様式がある。原子AとBが2個の電子を共有してつくる結合A:Bの開裂が対称的に起こり,AおよびBがそれぞれ1個の電子を得るとき,すなわち開裂が A:B―→A・+・B ……(1) のように進むとき,この様式を均等開裂homolytic cleavageという。生成したA・および・Bは(それが1個の原子からなる場合も含めて),不対電子を含めて奇数個の価電子をもち,ラジカルradical(フリーラジカル,遊離基ともいう)と呼ばれる。… ※「均等開裂」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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