METAL-METAL BONDING IN DINUCLEAR COMPLEXES OF PLATINUM(I) - CRYSTAL AND MOLECULAR-STRUCTURE OF CARBONYL(CHLORO)-BIS-MU-[BIS(DIPHENYLPHOSPHINO)METHANE]DIPLATINUM HEXAFLUOROPHOSPHATE

The structure of [Pt2Cl(CO) (μ-Ph2PCH2PPh2)2] [PF6] was determined by X-ray methods and refined to R = 0.082, using diffractometric intensities of 5646 independent reflections. The crystals are monoclinic, space group P21/n, a = 12.919(3), b = 15.576(6), c = 25.151(5)Å, β = 94.82(3)°, Z = 4. They are built of octahedral hexafluorophosphate anions and dinuclear platinum(I) cations. The latter contain PtCl and PtCO fragments linked to one another by a PtPt σ-bond and by two bridging bis(diphenylphosphino)methane ligands. The platinum atoms are in square planar environments and the dihedral angle between the two coordination planes is 40.1°. Selected bond lengths are: PtPt 2.620(1), PtCl 2.384(5), PtC 1.89(3) and PtP 2.291(5) - 2.308(5)Å. © 1979.