trans-Bis[bis-(di-phenyl-phosphan-yl)methane-κ(2)P,P']di-chlorido-ruthenium(II): a triclinic polymorph.

The title compound, [RuCl(2)(C(25)H(22)P(2))(2)] or [RuCl(2)(dppm)(2)] (dppm = bis-(di-phenyl-phosphan-yl)methane, C(25)H(22)P(2)) crystallizes as two half-mol-ecules (completed by inversion symmetry) in space group P (Z = 2), with the Ru(II) atoms occupying inversion centers at 0,0,0 and 1/2, 1/2, 1/2, respectively. The bidentate phosphane ligands occupy equatorial positions while the chlorido ligands complete the distorted octa-hedral coordination spheres at axial positions. The bite angles of the phosphane chelates are similar for the two mol-ecules [(P-Ru-P)(avg.) = 71.1°], while there are significant differences in the twisting of the methyl-ene backbone, with a distance of the methyl-ene C atom from the RuP(4) plane of 0.659†(2) and 0.299†(3)†à , respectively, and also for the phenyl substituents for both mol-ecules due to variations in weak C-H⋯Cl inter-actions.