Crystal structure of cis-[1,2-bis-(di-phenyl-phosphan-yl)ethene-κ2P, P']di-chlorido-platinum(II) chloro-form disolvate: a new polymorph

Jimmy Mugemana; John Bender; Richard J Staples; Shannon M Biros

doi:10.1107/S2056989018008836

Crystal structure of cis-[1,2-bis-(di-phenyl-phosphan-yl)ethene-κ²P, P']di-chlorido-platinum(II) chloro-form disolvate: a new polymorph

Acta Crystallogr E Crystallogr Commun. 2018 Jun 21;74(Pt 7):998-1001. doi: 10.1107/S2056989018008836. eCollection 2018 Jul 1.

Authors

Jimmy Mugemana¹, John Bender¹, Richard J Staples², Shannon M Biros¹

Affiliations

¹ Department of Chemistry, Grand Valley State University, 1 Campus Dr., Allendale, MI 49401, USA.
² Center for Crystallographic Research, Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA.

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-(di-phenyl-phosphan-yl)ethyl-ene (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 mol-ecule in the asymmetric unit along with two solvate chloro-form mol-ecules. 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 mol-ecule is linked to the chloro-form solvate mol-ecules by C-H⋯Cl hydrogen bonds and face-on C-Cl⋯π inter-actions. There are also weak offset π-π inter-actions present [inter-centroid distances are 3.770 (6) and 4.096 (6) Å], linking the mol-ecules to form supra-molecular sheets that lie in the bc plane.

Keywords: C—H⋯Cl hydrogen bonding; cis-dppe; crystal structure; face-on C—Cl⋯π interactions; offset π–π interactions; polymorph.

Grants and funding

This work was funded by National Science Foundation grants CCLI CHE-0087655, MRI CHE-1725699, and REU CHE-1559886. GVSU OURS, CSCE and Chemistry Department’s Weldon Fund grant .