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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Cross-conjugation ： ウィキペディア英語版 Cross-conjugation Cross-conjugation is a special type of conjugation in a molecule, when in a set of three Pi bonds only two pi-bonds interact with each other by conjugation, the third one is excluded from interaction.〔N. F. Phelan, "Cross Conjugation" in Journal of Chemical Education, 1968 (45/10), 633-637.〕 Whereas a normal conjugated system such as a polyene typically has alternating single and double bonds along consecutive atoms, a cross-conjugated system has a double-bonded unit single-bonded to one of the middle atoms of another conjugated chain. In classical terms, one of the double-bonds branches off rather than continuing consecutively: the main chain is conjugated, and part of that same main chain is conjugated with the side group, but all parts are not conjugated together as strongly. Examples of cross-conjugation can be found in molecules such as benzophenone, divinylketones, p-quinones, dendralenes, radialenes, and fullerene. The type of conjugation has an impact on reactivity and molecular electronic transitions. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cross-conjugation」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.