Synthesis and structural characterization of tetra-μ3-carbonylhexacarbonyltris[bis(diphenylphosphino)methane]-hexarhodium

The title compound Rh6(CO)10(DPM)3 (DPM bis(diphenylphosphino)-methane), obtained by heating Rh6(CO)16 and DPM in toluene, contains an octahedral rhodium cluster, with a mean RhRh bond length of 2.783 Å, which bears four triple bridging and six terminal carbonyl ligands, and three DPM molecules chelating pairs of adjacent metal atoms (mean RhP 2.307 Å). Thus each Rh atom is connected to one phosphorous atom and to one terminal and two triple-bridging carbonyl ligands. © 1982.