Metal carbonyl clusters compounds

Novel reactions of metal carbonyl cluster compounds, R. D. Adams and 1. T. Horvarth, Prog. Inorg. Chem., 1985, 33,127 (200). 

The idea (50, 5/) of dual coordination of CO implies the presence of two coordination centers in a Fischer-Tropsch catalyst system, i.e., a carbonyl carbon coordinating center, Ma, and a carbonyl oxygen coordinating center, M6 (14). It is this concept which has led at least two groups to examine transition metal carbonyl cluster compounds as homogeneous Fischer-Tropsch catalysts. 

The role of bridging groups in metal carbonyl cluster compounds is still not completely understood but has been discussed qualitatively by... 

Metal carbonyl cluster compounds which contain three ruthenium or three osmium atoms in the cluster core are common.1 Potentially useful reagents for syntheses of these compounds are the triruthenium and triosmium dianions [M3(CO)h]2 (M = Ru, Os).2 Therefore, it is desirable to develop good synthetic routes to obtain [M3(CO)11]2- (M = Ru, Os) of high purity in high yields. A method that is particularly useful for generating [M3(CO)n]2 (M = Ru, Os) is the designed stoichiometric reduction of M3(CO)12 (M = Ru, Os) using an electron carrier such as potassium-benzophenone.3... 

K. Wade, The Structural Significance of the Number of Skeletal Bonding Electron-pairs in Carboranes, the Higher Borane Anions, and Various Transition-metal Carbonyl Cluster Compounds, Chem. Comm. 1971, 792-793. 

Because of the great strength of iridium-iridium bonds, there is a wealth of information on polynuclear metal-carbonyl cluster compounds of iridium (see Dinuclear Organometallic Cluster Complexes mA Polynuclear Organometallic Cluster Complexes). It4(CO)i2 (45) may be synthesized from... 

Adams, Richard D. and Horvath, Istvdn T., Novel Reactions of Metal Carbonyl Cluster Compounds. 33 127... 

The first metal carbonyl compounds Ni(CO)4 and Fe(CO)s were prepared and characterized by L. Mond and his group in 1889-91 and this work has burgeoned into the huge field of metal carbonyl cluster compounds which is still producing results of fundamental importance. Even more extensive is the field of organometal-lic chemistry which developed rapidly after the seminal papers on the sandwich structure of ferrocene (E. O. Fischer and W. Pfab, 1952 ... 

Heilweil E J, Cavanagh R R and Stephenson J C 1988 CO (v= 1) population lifetimes of metal-carbonyl cluster compounds in dilute CHClg solution J. Chem. Phys. 89 230-9... 

If the enthalpy of formation of a particular metal carbonyl cluster compound M.v(CO). has been measured, typically by calorimetric determination of the enthalpy of combustion, one can calculate the enthalpy of disruption of that cluster in... 

Chemical and photochemical reactions of metal carbonyl cluster compounds on solid surfaces [analysed by EXAFS]... 

Wade, K. (1971) The stmctural significance of the number of skeletal bonding electron-pairs in carboranes, the higher boranes and borane anions, and various transition-metal carbonyl cluster compounds. J. Chem. Soc., D Chem. Commun., (15), 792-793. 

Many transition metal cluster compounds are metal carbonyl derivatives. Many metal carbonyl derivatives lose carbon monoxide upon pyrolysis or photolysis. If these decomposition processes are controlled, a reactive coordinatively unsaturated metal carbonyl fragment which oligomerizes to a metal carbonyl cluster may be obtained, as exemplified by the following syntheses of metal carbonyl cluster compounds discussed later in this chapter, on pages 399, 396, and 375, respectively. 

X-ray single crystal diffraction, and this method remains one of the most valuable tools for the characterization of newly synthesized metal cluster compounds. In particular, the presence of short metal atom distances, determined by X-ray diffraction, indicate the presence of metal-metal bonds in clusters. The X-ray diffraction data also indicate the identity and disposition of ligands, such as CO, which usually surround the metal cluster core. A simple metal carbonyl cluster compound is [Fe2(CO)9], (Fig. 1). 

As befits current interest, the largest number of reviews centre on metal carbonyl cluster compounds. General topics covered included electron transfer reactions, ligand and cluster transformations, and the chemistry of metal clusters containing nitrosyl and nitrido ligands.More specific topics reviewed include sulphi do-osmium carbonyl cluster compounds,and homonuclear platinum clusters.The preparations of [Nb(C0)6] [M2(CO)io(m-H)]" (M = Cr or W), Mn2(C0)aX2 and Re C0)sX (X = Cl, Br or I) are described in Volume 23 of Inorganic Syntheses. ... 

When transition metal carbonyl cluster compounds are photolyzed, fragmentation of the cluster is frequently observed. Examples of such reactions... 

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