Crystal structure of cis-[1,2-bis(diphenylphosphanyl)ethene-κ2P,P′]dichloridoplatinum(II) chloroform disolvate: a new polymorph

Abstract

The title compound, [PtCl2(C26H22P2)]·2CHCl3 (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 P21/c, with one complex molecule in the asymmetric unit along with two solvate chloroform molecules. The PtII 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.

Keywords

• crystal structure
• polymorph
• cis-dppe
• C—H...Cl hydrogen bonding
• face-on C—Cl...π interactions
• offset π–π interactions