Crystal structure of cis-[1,2-bis­(di­phenyl­phosphan­yl)ethene-κ(2) P,P′]di­chlorido­platinum(II) chloro­form disolvate: a new polymorph

The title compound, [PtCl(2)(C(26)H(22)P(2))]·2CHCl(3) (I), is the third monoclinic polymorph of this platinum(II) complex involving the bidentate ligand cis-1,2-bis­(di­phenyl­phosphan­yl)ethyl­ene (cis-dppe) [for the others, see: Oberhauser et al. (1998a ▸). Inorg. Chim. Acta, 274, 143–154, and Oberhauser et al. (1995 ▸). Inorg. Chim. Acta, 238, 35–43]. The structure of compound (I) was solved in the space group P2(1)/c, with one complex mol­ecule in the asymmetric unit along with two solvate chloro­form mol­ecules. The Pt(II) atom is ligated by two P and two Cl atoms in the equatorial plane and has a perfect square-planar coordination sphere. In the crystal, the complex mol­ecule is linked to the chloro­form solvate mol­ecules by C—H⋯Cl hydrogen bonds and face-on C—Cl⋯π inter­actions. There are also weak offset π–π inter­actions present [inter­centroid distances are 3.770 (6) and 4.096 (6) Å], linking the mol­ecules to form supra­molecular sheets that lie in the bc plane.