Synthesis and Characterization of an Unusual 68-Electrons Os4Se3 Carbonyl Phosphane Cluster

Autor: Daniele Cauzzi, Roberto Pattacini, Giovanni Predieri, Claudia Graiff
Rok vydání: 2013
Předmět:
Zdroj: Journal of Cluster Science. 24:11-16
ISSN: 1572-8862
1040-7278
DOI: 10.1007/s10876-012-0544-1
Popis: The 68-electrons, phosphane-substituted, osmium selenido-carbonyl cluster [Os4Se3(CO)10(dppm)] (cluster 3; dppm = bis(diphenylphosphino)methane) has been obtained by reaction under mild experimental conditions between [Os3(CO)12] and the diphosphane diselenide dppmSe2. Its crystal and molecular structure has been elucidated by X-ray diffraction methods. Cluster 3 contains only two Os–Os bonds as suggested by its electron count. It can be described as derived from the open-triangular nido cluster [Os3(μ3-Se)2(CO)9] through substitution of one CO ligand by the four-electrons donor osmiaselone fragment [CH2(Ph2P)2](CO)2Os=Se. The replacement of a two-electrons donor carbonyl with a four-electron donor fragment produces the cleavage of one Os–Os bond in the nido cluster. Under the adopted experimental conditions, other products of the reaction between [Os3(CO)12] and dppmSe2 are the clusters [Os3(μ3-Se)2(CO)9] (1), [Os3(μ3-Se)2(CO)7(μ-dppm)] (2), and [Os3(μ3-Se)(CO)8(μ-dppm)] (4), already described in the literature.
Databáze: OpenAIRE
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