翻訳と辞書 Words near each other ・ Sulfolobales ・ Sulfolobus ・ Sulfolobus acidocaldarius ・ Sulfolobus metallicus ・ Sulfolobus solfataricus ・ Sulfolobus tokodaii ・ Sulfolobus turreted icosahedral virus 1 ・ Sulfonamide ・ Sulfonamide (disambiguation) ・ Sulfonamide (medicine) ・ Sulfonamide hypersensitivity syndrome ・ Sulfonanilide ・ Sulfonate ・ Sulfone ・ Sulfonic acid ・ Sulfonium ・ Sulfonmethane ・ Sulfonucleotide reductase ・ Sulfonyl ・ Sulfonyl halide ・ Sulfonylurea ・ Sulfonylurea receptor ・ Sulfophobococcus ・ Sulfopropanediol 3-dehydrogenase ・ Sulfopyruvate decarboxylase ・ Sulfoquinovose ・ Sulfoquinovosyl diacylglycerol ・ Sulforaphane ・ Sulforhodamine 101 ・ Sulforhodamine B 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 Sulfonium ： ウィキペディア英語版 Sulfonium A sulfonium ion, also known as sulphonium ion or sulfanium ion, is a positively charged ion (a "cation") featuring three organic substituents attached to sulfur. These organosulfur compounds have the formula ()+. Together with a negatively charged counterion, they give sulfonium salts. They are typically colorless solids that are soluble in organic solvent. ==Synthesis== Sulfonium compounds are usually synthesized by the reaction of thioethers with alkyl halides. For example, the reaction of dimethyl sulfide with iodomethane yields trimethylsulfonium iodide: : + → + Before the above reaction, the sulfur atom has two lone electron pairs. One of these lone pairs links to the methyl group. At the same time, as part of a concerted nucleophilic substitution mechanism (SN2), the iodide leaving group departs. This leaves a positively charged trimethylsulfonium ion, whose charge is balanced by the iodide. The rate of reaction is even faster with stronger methylating agents, such as methyl trifluoromethanesulfonate. 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「Sulfonium」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.