Reactions of some iron and tungsten mercapto-complexes with electrophilic acetylenes leading to novel metallacycles. The crystal and molecular structure of the η<sup>2</sup>-vinyl complex [W{η<sup>2</sup>-C(CF<sub>3</sub>)C(CF<sub>3</sub>)C(O)SMe}(CO)<sub>2</sub>(η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>)]
作者:Jack L. Davidson、Mahmoud Shiralian、Ljubica Manojlović-Muir、Kenneth W. Muir
DOI:10.1039/dt9840002167
日期:——
ligand to give the η2-vinyl complex [Wη2-C(R)C(R)C(O)SR′}(CO)2(η5-C5H5)](R = CF3 only) followed by S-bonded vinyl ketone complexes [[graphic omitted]R′}(CO)2(η5-C5H5)] and ultimately O-bonded vinyl ketone derivatives [[graphic omitted]}(CO)2(η5-C5H5)] and co-ordinativelyunsaturated alkyne complexes [W(SR′)(CO)(RCCR)(η5-C5H5)](R = CF3 only). An X-ray structure determination of the η2-vinyl complex [Wη
的[Fe(SR')(CO)的反应2(η 5 -C 5 H ^ 5)]与活化的炔烃CF 3 Ç CCF 3和的MeO 2 CC CCO 2我给杂环络合物[[图形省略] R'}(CO )(η 5 -C 5 H ^ 5)](R'=烷基或芳基,R = CF 3或CO 2 Me)的。相关衍生物[[图形省略] R'}(CO)2(η 5 -C 5 H ^ 5)](R'= Me或Et)从[W(SR')获得的(CO)3(η 5 -C 5 H5)]和在20℃下在己烷中的炔烃经历热异构化的25℃以上最初涉及SR的新颖1,3-移'配体跨越eneone配体,得到η序列2 -乙烯基配合物[W η 2 -C(R)C(R)C(O)SR'}(CO) 2(η 5 -C 5 H ^ 5)](R = CF 3只),接着S-键合的乙烯基酮络合物[[图形省略] R'}(CO) 2(η 5 -C 5 H ^ 5)]和最终O型键合的乙烯基酮衍生物[[图形省略]}(CO)
Alkyne diruthenium chemistry
作者:Joshi Kuncheria、Hameed A Mirza、Jagadese J Vittal、Richard J Puddephatt
DOI:10.1016/s0022-328x(99)00432-5
日期:2000.1
The reaction of [Ru2(CO)4(μ-CO)(μ-dppm)2] (1) with alkynes RCCR′ gives the alkyne complexes [Ru2(CO)4(μ-RCCR′)(μ-dppm)2] [2, R′=H; 3, R′=CO2Me or COMe; 4, R′=CCR], [Ru2(CO)4H(CCR)(μ-dppm)2] (5) or [Ru2(CO)2(μ-CO)H(μ-CCR)(μ-dppm)2] (6), when R=Ph. Complex 6 reacts with chlorinated solvent to give [Ru2(CO)2(μ-CO)Cl(μ-CCR)(μ-dppm)2] (7), R=Ph. Complex 1 reacts with excess alkyne RCCH to give [Ru2(CO
A comparative study of the reactivity of the σ(Pd–Csp2, ferrocene) and σ(Pd–Csp2, biphenyl) bonds in cyclopalladated complexes derived from [Fe(η5-C5H5)(η5-C5H4CHNC6H4C6H5-2)]
Thus palladacycles containing seven-, eight-, nine- and ten-memberedrings have been isolated and characterized. The crystal structure of [Pd(EtCCEt)2(C6H4-2-C6H4)NCH(η5-C5H4)Fe(η5-C5H5)}Cl] has also been determined and confirms the presence of a [6, 6, 10] tricyclic system arising from fusion of the two hexagonal rings of the biphenyl group and a ten-membered palladacycle generated through bis(insertion)
一项研究已经取得的σ(的Pd-C的反应的SP 2)键在二μ氯桥连的环钯配合物[钯(η 5 -C 5 H ^ 3 CH NC 6 H ^ 4 Ç 6 ħ 5 -2)的Fe(η 5 -C 5 H ^ 5)}(μ-Cl)的] 2 1A和[钯(C 6 H ^ 4 -2-C 6 H ^ 4)N CH(η 5 -C 5 H ^ 4)的Fe(η 5 -C 5 H ^ 5)}(μ-Cl)的]2 1b 其金属化碳原子C sp 2的性质不同, 二茂铁或C sp 2, 联苯,分别} 炔烃,R 1 C CR 2 其中R 1 = R 2 = Et;R 1 = H,Me或Ph,R 2 = Ph;或R 1 = R 2 = CO 2 Me}。因此,已经分离并表征了包含七元,八元,九元和十元环的palladacycles。[钯(ETC的晶体结构CET)2(C 6 H ^ 4 -2-C 6 H ^ 4)N
Kinetics and mechanism of the reactions of bis(cyclopentadienyl carbonyl nickel) with alkynes
Abstract The rates of the reaction of Cp 2 Ni 2 (CO) 2 (Cp = π-cyclopentadienyl) with alkynes are reported. The reaction proceeds by two different mechanisms, a two-stage mechanism, with first-order-rate-determining-step, and a bimolecular associative mechanism. Either on both may prevail depending on the nature, or the bulkiness of the ligand. First order path implies, more probably, the homolytic
摘要报道了Cp 2 Ni 2(CO)2(Cp =π-环戊二烯基)与炔烃的反应速率。该反应通过两种不同的机理进行,即具有一级速率确定步骤的两阶段机理和双分子缔合机理。取决于配体的性质或体积,两者均可占优势。一阶路径更可能暗示着速率确定的均相Ni-Ni裂变。二阶速率常数的值表明,在配位炔烃中,π-受体容量比σ-供体容量重要。
Trans-selective hydrogermylation of alkynes promoted by methyliron and bis(germyl)hydridoiron complexes as a catalyst precursor
internal alkynes was attained by a methyliron complex, CpFe(CO)(2)(Me), and a bis(germyl)hydridoiron(IV) complex as a catalyst precursor. The structures of (Z)-triphenyl-(2-phenylethenyl)germane and the bis(germyl)hydridoiron(IV) complexes CpFe(CO)(H)(GeR(3))(2) (R = Et, Ph) were confirmed by single crystal X-ray diffraction studies.