翻訳と辞書 Words near each other ・ Ketola ・ Ketoli Chengappa ・ Ketolide ・ Ketone ・ Ketone bodies ・ Ketone enolate ・ Ketone halogenation ・ Ketonic decarboxylation ・ Keteleeria fortunei ・ Ketelmeer ・ Ketema ・ Ketema Nigusse ・ Ketema Yifru ・ Ketena Hulet Mulu Wongel church ・ Ketendere, Nazilli ・ Ketene ・ Ketene cycloaddition ・ Ketengban language ・ Ketengus typus ・ Ketenimine ・ Ketenler, Bolu ・ Ketenlik, Bozüyük ・ Ketenova, Nazilli ・ Ketenyeri, Köşk ・ Ketepa ・ Keter ・ Keter (disambiguation) ・ Keter (name) ・ Keter Betts ・ Keter Plastic Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Ketene ： ウィキペディア英語版 Ketene A ketene is an organic compound of the form R'R''C=C=O. The term is also used specifically to mean ethenone, the simplest ketene, where R' and R'' are hydrogen atoms. Ketenes were first studied as a class by Hermann Staudinger.〔 〕 ==Formation== Ethenone, the simplest ketene, can be formed by pyrolysis (thermal cracking) of acetone: :CH3−CO−CH3 + ΔT → CH2=C=O + CH4 This reaction is called the Schmidlin ketene synthesis.〔Ketene in Organic Syntheses Organic Syntheses, Submitted by C. D. Hurd Checked by Oliver Kamm Coll. Vol. 1, p.330 (1941); Vol. 4, p.39 (1925). (Link )〕〔Schmidlin and Bergmann, Ber. 43, 2881 (1910);〕 Ketenes can be prepared from acyl chlorides by an elimination reaction in which HCl is lost: : In this reaction, a base, usually triethylamine, removes the acidic proton alpha to the carbonyl group, inducing the formation of the carbon-carbon double bond and the loss of a chloride ion. Ketenes can also be formed from α-diazoketones by Wolff rearrangement. 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「Ketene」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.