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- W2059520245 abstract "Pyrolysis of the heterodinuclear compounds (η5-C5Me5)(CO)NiM(CO)3(η5-C5H5) [M = Mo or W] afforded the tetranuclear clusters Ni2Mo2(CO)4(η5-C5H5)2(η5-C5Me5)2 and Ni2W2(CO)4(η5-C5H5)2(η5-C5Me5)2. The reactions proceed via the isolated coordinatively unsaturated intermediates (η5-C5Me5)NiMo(CO)3(η5-C5H5) and (η5-C5Me5)NiW(CO)3(η5-C5H5) respectively. The clusters are believed to contain tetrahedral Ni2M2 cores. This contrasts with products obtained when the nickel-cyclopentadienyl species (η5-C5H5)(CO)NiM(CO)3(η5-C5H4Me) [M = Mo, W] were subjected to thermolysis, affording paramagnetic clusters with Ni3M tetrahedral metallic cores as the predominant products [M.J. Chetcuti, J.C. Huffman and S.R. McDonald, Inorg. Chem., 28 (1989) 238]. Traces of the cluster Ni2W2(CO)4(η5-C5H5)2(η5-C5H4Me)2 have also recently been characterized. The heterobimetallic compounds (η5-C5H5)(CO)NiM(CO)3(η5-C5H4Me) [M = Mo, W] react with Co2(CO)8 yielding a mixture whose constituents' relative proportions are quite sensitive to the reaction conditions. Isolated products include the mixed-metal clusters Co2NiM(CO)8(η5-C5H5)(η5-C5H4Me) (M = Mo, W) and CoNiW2(CO)7(η5-C5H5)(η5-C5H4Me)2 as well as Co3M(μ-CO)3(CO)8(η5-C5H4Me), Co2W2(CO)10(η5-C5H4Me)2 and the dinuclear species (OC)4CoM(CO)3(η5-C5H4Me) (M = Mo, W)." @default.
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- W2059520245 date "1990-08-01" @default.
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- W2059520245 title "Synthesis of mixed-mtal clusters using nickel-molybdenum and nickel-tungsten complexes as cluster building blocks" @default.
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- W2059520245 doi "https://doi.org/10.1016/0022-328x(90)87267-h" @default.
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