On the mechanism of acidic hydrogen isotopic exchange in transition metal σ-benzyl-π-cyclopentadienyldicarbonyl complexes
作者:T.Yu. Orlova、V.N. Setkina、D.N. Kursanov
DOI:10.1016/s0020-1693(00)88329-2
日期:1981.1
Abstract The hydrogenisotopicexchange reaction in Fe, Mo and W σ-benzyl-π-cyclopentadienyl complexes has been discovered and studied. The reaction mechanism has been investigated by means of the stereochemical indication, kinetic effect etc. techniques.
Photochemistry of alkyltricarbonyl(η<sup>5</sup>-cyclopentadienyl)tungsten (alkyl = Et, Pr<sup>n</sup>, Pr<sup>i</sup>, Bu<sup>n</sup>, or CH<sub>2</sub>Ph), tricarbonyl(η<sup>5</sup>-cyclopentadienyl)(phenyl)tungsten, tricarbonyl(η<sup>5</sup>-pentamethylcyclopentadienyl)(n-propyl)tungsten, and tricarbonyl(η<sup>5</sup>-cyclopentadienyl)(ethyl)-molybdenum in gas matrices at 12 K and in solutions at 243 K
作者:Khalil A. Mahmoud、Antony J. Rest、Helmut G. Alt、Manfred E. Eichner、Brigitte M. Jansen
DOI:10.1039/dt9840000175
日期:——
16-electron species [M(CO)2R(η5-C5R′5)](R = alkyl or aryl). The identity of the co-ordinativelyunsaturatedspecies was confirmed by 13CO-labelling in [W(CO)3Ph(η5-C5H5)] and fitting the terminal CO stretching bands using an energy-factored force-field program. For the alkyl complexes with β-hydrogens, thermal and photochemical reactions led to the conversion of [M(CO)2(alkyl)(η5-C5R′5)] species into the
Photo-induced degradation reactions of some alkyl- and aryl-carbonyl derivatives of manganese, molybdenum and tungsten
作者:Thomas E. Gismondi、Marvin D. Rausch
DOI:10.1016/0022-328x(85)80012-7
日期:1985.3
Photo-induced degradation of CH3Mn(CO)5 in pentane solution results in the formation of Mn2(CO)10, methane and carbon monoxide. Both CH3D and CH4 are formed when CH3Mn(CO)5 is photolyzed in C6D6. Photolysis of C6H5CH2Mn(CO)5 in pentane solution produces Mn2(CO)10, toluene and bibenzyl. Analogous photodegradation of C6H5Mn(CO)5 in pentane solution yields Mn2(CO)10, benzene and carbon monoxide, but not
CH 3 Mn(CO)5在戊烷溶液中的光诱导降解导致形成Mn 2(CO)10,甲烷和一氧化碳。当CH 3 Mn(CO)5在C 6 D 6中光解时,同时形成CH 3 D和CH 4。C 6 H 5 CH 2 Mn(CO)5在戊烷溶液中的光解产生Mn 2(CO)10,甲苯和联苄。C 6 H 5 Mn(CO)5的类似光降解在戊烷溶液中,生成Mn 2(CO)10,苯和一氧化碳,但不生成联苯。通过在-40℃下在溶液中光解热不稳定的络合物C 2 H 5 Mn(CO)5进行了研究。GC分析表明形成乙烯和乙烷,并且这些产物的摩尔比取决于C 2 H 5 Mn(CO)5的初始浓度。这些结果与该反应的β-氢消除机理一致。CpMo(CO)3 CH 2 C 6 H 5在戊烷溶液中的光解产生[CpMo(CO)3 ]2和甲苯,而CPW(CO)的光解3 CH 2 C ^ 6 ħ 5,得到[CPW(CO)3 ] 2,CPW(CO)2(η
Intermolecular insertion of the carbene ligand of pentacarbonyl tungsten benzylidenes into the M–H bond of transition metal hydrido complexes
作者:Helmut Fischer、Holger Jungklaus
DOI:10.1016/s0022-328x(98)00942-5
日期:1999.1
carbene complexes [(CO)5WC(H)C6H4R-p] (2) [R=H (a), Me (b), OMe (c)] react with the terminal transition metal hydrides [(CO)5MnH] (3) and [Cp(CO)3WH] (5) by a formal transfer and insertion of the carbene ligand into the M–H bond (M=Mn, W) to give the benzyl complexes [(CO)5MnCH2C6H4R-p] (4a–c) and [Cp(CO)3WCH2C6H4R-p] (6a–c). Similarly, 6a is formed when solutions of [(CO)5CrC(H)Ph] (7a) or [Cp(CO)2MnC(H)Ph]
强电卡宾配合物[(CO)5 WC(H)C 6 H ^ 4 R- p ](2)[R = H(一)中,Me(b),OME(Ç)]与终端过渡反应金属氢化物[(CO)5 MnH](3)和[Cp(CO)3 WH](5)通过形式转移和将卡宾配体插入MH键(M = Mn,W)来获得苄基配合物[(CO)5 MnCH 2 C 6 H 4 R- p ](4a – c)和[Cp(CO)3WCH 2 C 6 H 4 R- p ](6a – c)。类似地,图6a时[(CO)的解决方案,形成5 CrC(H)PH](7A)或的[Cp(CO)2 MnC(H)PH](图8A)与处理5。2c与[Cp *(CO)3 WH](9)(Cp * = C 5 Me 5)的类似反应得到[Cp *(CO)3 WCH 2 C 6 H 4 OMe- p ](10)。相反,2b与[Cp 2 WH 2 ](11)和PNP [(CO)4 Fe
The preparation of a new series of bridged trinuclear complexes by reaction of η5-(C5H4Li) compounds with alkyltrichlorosilanes
作者:Michael E. Wright、Victor W. Day
DOI:10.1016/s0022-328x(00)98893-4
日期:1980.7
Several new bridged trinuclear complexes of the general formula RSi[η5-C5H4M(CO)nR1]3, have been prepared in good yield from the reaction of the lithiated compounds (η5-C5H4Li)M(CO)nR1 (M = Mn, W, Fe; R1 = Me, Et, and benzyl) with various alkyl trichlorosilanes. The crystal and mlecular structure of MeSi[η5-C5H4Fe(CO)2C2H5]3 is presented. In addition, some limitations of the direct cyclopentadienyl
通式为RSi [η的几个新的桥接三核络合物5 -C 5 H ^ 4 M(CO)ñ - [R 1 ] 3,都以良好的收率制备从锂化化合物的反应(η 5 -C 5 H ^ 4栗)M(CO)n R 1(M = Mn,W,Fe; R 1 = Me,Et和苄基)与各种烷基三氯硅烷。晶体和MESI [η的mlecular结构5 -C 5 H ^ 4的Fe(CO)2 C ^ 2 ^ h 5 ] 3被表达。另外,讨论了直接环戊二烯基环金属化的一些限制。