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DOI: 10.1039/A608596B (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1997, 1515-1520

Reaction of [Os3(µ-H)2(CO)10] with trans-[Pd(NH3)2I2]; molecular structures of [Os6Pd(µ-H)8(CO)18], [Os4Pd(µ-H)4(CO)12(µ-I)2 ], [Os4Pd(µ-H)3(CO)12(µ-I)3 ] and [{Os3Pd(µ-H)3(CO)9(µ-I) }2]

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Janesse Wing-Sze Hui and Wing-Tak Wong

Abstract

Reaction of the co-ordinatively unsaturated cluster [Os3(µ-H)2(CO)10] with trans-[Pd(NH3)2I2] afforded the complexes [Os6Pd(µ-H)8(CO)18] 1, [Os4Pd(µ-H)4(CO)12(µ-I)2 ] 2, [Os4Pd(µ-H)3(CO)12(µ-I)3 ] 3 and [Os3(CO)12] in moderate yields. Thermolysis of 2 in refluxing chloroform produced 3 and the linked cluster [{Os3Pd(µ-H)3(CO)9(µ-I) }2] 4. Complexes 1–4 were fully characterised by IR and 1H NMR spectroscopy, mass spectrometry, elemental analysis and X-ray crystallography. The structures of 1 and 2 are based on vertex-shared condensed polyhedra with the palladium atoms at the vertex-sharing sites. The molecular structure of complex 1 consists of a central palladium atom sandwiched between two triosmium units. Complexes 2 and 3 possess a similar metal disposition in which an {Os3Pd} tetrahedron bridges to a mononuclear ‘Os(CO)3’ moiety via two and three bridging iodide ligands respectively. Complex 4 is dimeric with two {Os3Pd} tetrahedra tied together by two bridging iodide ligands.

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