Crystal structures of ( Z )-(ethene-1,2-di-yl)bis-(di-phenyl-phosphine sulfide) and its complex with Pt II dichloride.

The crystal structures of ( Z )-(ethene-1,2-di-yl)bis-(di-phenyl-phosphine sulfide), C 26 H 22 P 2 S 2 ( I ), along with its complex with Pt II dichloride, di-chlorido[( Z )-(ethene-1,2-di-yl)bis-(di-phenyl-phosphine sulfide)-κ 2 S , S ']platinum(II), [PtCl 2 (C 26 H 22 P 2 S 2 )] ( II ), are described here. Compound I features P=S bond lengths of 1.9571 (15) and 1.9529 (15) Å, with a torsion angle of 166.24 (7)° between the two phosphine sulfide groups. The crystal of compound I features both intra-molecular C-H⋯S hydrogen bonds and π-π inter-actions. Mol-ecules of compound I are held together with inter-molecular π-π and C-H⋯π inter-actions to form chains that run parallel to the z -axis. The inter-molecular C-H⋯π inter-action has a H⋯ Cg distance of 2.63 Å, a D ⋯ Cg distance of 3.573 (5) Å and a D -H⋯ Cg angle of 171° (where Cg refers to the centroid of one of the phenyl rings). These chains are linked by relatively long C-H⋯S hydrogen bonds with D ⋯ A distances of 3.367 (4) and 3.394 (4) Å with D -H⋯ A angles of 113 and 115°. Compound II features Pt-Cl and Pt-S bond lengths of 2.3226 (19) and 2.2712 (19) Å, with a P=S bond length of 2.012 (3) Å. The Pt II center adopts a square-planar geometry, with Cl-Pt-Cl and S-Pt-S bond angles of 90.34 (10) and 97.19 (10)°, respectively. Mol-ecules of compound II are linked in the crystal by inter-molecular C-H⋯Cl and C-H⋯S hydrogen bonds.