Chemistry of methinyltricobalt enneacarbonyls. Part V. Tertiary phosphine and arsine derivatives
作者:T. W. Matheson、B. H. Robinson、W. S. Tham
DOI:10.1039/j19710001457
日期:——
Mono-, di-, and tri-substituted tertiary phosphine and arsine derivatives of methinyltricobaltenneacarbonyls have been prepared. The co-ordination behaviour of the cluster is determined by the apical substituent Y, and the stereochemistry adopted is one which minimizes nonbonded carbonyl interactions. Thus the majority of mono-substituted complexes have the same structure as MeCCo3(CO)8Ph3P but other
Reactions of diarsines with bi- and tri-metallic carbonyl complexes containing cobalt
作者:Nick Choi、Gráinne Conole、Jason D. King、Martin J. Mays、Mary McPartlin、Caroline L. Stone
DOI:10.1039/a906611j
日期:——
Reaction of the diarsines As2R4 (R = Me or Ph) with alkyne-bridged dicobalt hexacarbonyl complexes leads to products with bridging (AsR2)2O ligands and to the production of simple AsR3 substituted complexes; alkylidyne tricobalt nonacarbonyl complexes exhibit parallel reactivity with As2R4. Thermolysis of the complex [Co2(μ-PhCCPh)μ-(AsMe2)2O}(CO)4] gives the tetra-substituted complex, [Co2(μ-PhCCPh)μ-(AsMe2)2O}2(CO)2]. Reaction of the heterometallic complex [(OC)3Coμ-C2(CO2Me)2}MoCp(CO)2] with As2Ph4 affords [(HO)Ph2As}(OC)2Coμ-C2(CO2Me)2}MoCp(CO)2], supporting the suggestion of a possible hydrolytic mechanism for the formation of the (AsR2)2O bridged complexes.
An amphiphilic trinuclear cobalt cluster-containing molecular unit: synthesis, characterization and Langmuir–Blodgett films
作者:Robert Deschenaux、Claudio Masoni、Helen Stoeckli-Evans、Sebastien Voucher、Jürgen Ketterer、Rolf Steiger、Albrecht L. Weisenhorn
DOI:10.1039/dt9940001051
日期:——
An amphiphilic polynuclear transition-metal cluster has been prepared and its capability for forming layers at the air–water interface and Langmuir–Blodgett films on different substrates investigated. The compound was obtained by linking a Co3(CO)9 cluster to a hydrophobic cholesterol framework. A polar head was introduced by substituting one CO ligand by an isocyanide derivative bearing a hydrophilic
已经制备了两亲性多核过渡金属簇,并研究了其在空气-水界面和在不同基材上的Langmuir-Blodgett膜上形成层的能力。该化合物是通过将Co 3(CO)9簇连接到疏水性胆固醇骨架上而获得的。通过用带有亲水性官能团的异氰酸酯衍生物取代一个CO配体来引入极性头。表面压力和表面电势与面积等温线和布鲁斯特角显微镜表明形成了稳定的Langmuir膜。在疏水化的固体(云母,玻璃,石英和硅片)上进行了多达三十六次转移。转移膜的结构表征(紫外和红外光谱,原子力显微镜,电子邮件角度X射线散射)表明形成了稳定的,高度组织化的晶体。结果代表了从多核过渡金属化合物和有机金属表面发展超分子组装的新策略。通过X射线晶体学已经确定了[Co 3(CO)8(CCO 2 Me)(CNC 6 H 4 CN)]的结构。
Cluster chemistry. Reactions between metal carbonyl clusters and Lewis bases initiated by radical ions: improved syntheses of substituted derivatives of M3and M4 clusters(M = Fe, Ru, Os or Co)
作者:Michael L. Bruce、David C. Kehoe、Janis G. Matisons、Brian K. Nicholson、Philip H. Rieger、Michael L. Williams
DOI:10.1039/c39820000442
日期:——
Addition of catalytic amounts of Ph2Co˙–to a mixture of the appropriate cluster with stoicheiometric amounts of Lewis base in tetrahydrofuran gave the substituted derivatives [Fe3(CO)11(L)],[Ru3(CO)12–n(L)n],[Os3(CO)11(L)], and [H4Ru4(CO)12–n(L)n][n= 1–3; L = ButNC,PR3,P(OR)3]in greatly improved yields.
催化量的Ph加成2 CO -与化学计量量的路易斯碱的四氢呋喃的相应的集群的混合物,得到取代的衍生物的[Fe 3(CO)11(L)],[孺3(CO)12 Ñ(L)n ],[Os 3(CO)11(L)]和[H 4 Ru 4(CO)12– n(L)n ] [ n = 1-3;L = Bu t NC,PR 3,P(OR)3 ] in大大提高了产量。
Organocobalt cluster complexes
作者:Dietmar Seyferth、Cynthia Nivert Rudie
DOI:10.1016/s0022-328x(00)93764-1
日期:1980.1
types ROC(O)CCo3(CO)9 and RR′NC(O)CCo3(CO)9, respectively. These reactions are accelerated by triethylamine. In the presence of triethylamine, the normally unreactive phenols and anilines react to give ArOC(O)CCo3(CO)9 and ArNHC(O)CCo3(CO)9, respectively. Methylidynetricobalt nonacarbonyl itself, HCCo3(CO)9, reacts with alcohols and amines, but product yields are low. Possible mechanisms of these reactions