翻訳と辞書 Words near each other ・ Transition from Renaissance to Baroque in instrumental music ・ Transition from Sui to Tang ・ Transition from walking to running ・ Transition function ・ Transition Gallery ・ Transition Glacier ・ Transition House Association of Nova Scotia ・ Transition layer ・ Transition Magazine ・ Transition management ・ Transition management (governance) ・ Transition metal ・ Transition metal alkene complex ・ Transition metal alkyne complex ・ Transition metal benzyne complex ・ Transition metal carbene complex ・ Transition metal carbyne complex ・ Transition metal dichalcogenide monolayers ・ Transition metal dinitrogen complex ・ Transition metal dioxygen complex ・ Transition metal hydride ・ Transition metal oxo complex ・ Transition metal thiolate complex ・ Transition methodology ・ Transition modeling ・ Transition nuclear protein ・ Transition of state ・ Transition path sampling ・ Transition point ・ Transition radiation 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 Transition metal carbene complex ： ウィキペディア英語版 Transition metal carbene complex A transition metal carbene complex is an organometallic compound featuring a divalent organic ligand. The divalent organic ligand coordinated to the metal center is called a carbene. Carbene complexes for almost all transition metals have been reported. Many methods for synthesizing them and reactions utilizing them have been reported. The term carbene ligand is a formalism since many are not derived from carbenes and almost none exhibit the reactivity characteristic of carbenes. Described often as M=CR2, they represent a class of organic ligands intermediate between alkyls (-CR3) and carbynes (≡CR). They feature in some catalytic reactions, especially alkene metathesis, and are of value in the preparation of some fine chemicals. ==Classification of carbene complexes== Metal carbene complexes are often classified into two types. The Fischer carbenes named after Ernst Otto Fischer feature strong π-acceptors at the metal and being electrophilic at the carbene carbon atom. Schrock carbenes, named after Richard R. Schrock, are characterized by more nucleophilic carbene carbon centers, these species typically feature higher valent metals. N-heterocyclic carbenes (NHCs) were popularlized following Arduengo's isolation of a stable free carbene in 1991. Reflecting the growth of the area, carbene complexes are now known with a broad range of different reactivities and diverse substituents. Often it is not possible to classify a carbene complex with regards to its electrophilicity or nucleophilicity. 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「Transition metal carbene complex」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.