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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 Crotyl ： ウィキペディア英語版 Crotyl A crotyl group is an organic functional group with the formula RCH2CH=CHCH3. Systematically, it is called a but-2-en-1-yl group and exhibits geometric isomerism, being either ''cis'' (''Z'') or ''trans'' (''E''). There are many simple compounds in which the crotyl group forms base carbon chain: crotyl alcohol, crotonaldehyde, crotonic acid, and crotyl acrylate are examples. ==Synthesis of crotylates== Crotylate (crotyl anions) can be synthesised from 2-butene (either isomer): this reaction must be performed in the presence of organometallic reagents, as a base, usually alkyl lithium, or any alkylates of ''s''-block metals, in a solvent, typically THF, and at low temperatures, generally below -20 °C. The negative charge is delocalised over three of the carbon atoms of the crotylate group and there is resonance between the two possible delocalised forms (one for each terminal carbon). 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「Crotyl」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.