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 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 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.
Highlights
The title compound, [PtCl2(C26H22P2)]Á2CHCl3 (I), is the third monoclinic polymorph of this platinum(II) complex involving the bidentate ligand cis-1,2bis(diphenylphosphanyl)ethylene [for the others, see: Oberhauser et al (1998a)
The complex molecule is linked to the chloroform solvate molecules by C—HÁ Á ÁCl hydrogen bonds and face-on C—ClÁ Á Á interactions
There are weak offset – interactions present [intercentroid distances are 3.770 (6) and 4.096 (6) A ], linking the molecules to form supramolecular sheets that lie in the bc plane
Summary
The rigid compound cis-1,2-bis(diphenylphosphanyl)ethylene (cis-dppe) has been widely exploited as a bidentate ligand for transition metals. A selection of recent examples include complexes involving iron(II) (Song et al, 2018), copper(I) (Trivedi et al, 2017), gold(I) (Yao & Yam, 2015), nickel(II) (Schallenberg et al, 2014), nickel(III) (Hwang et al, 2015), and palladium(II) and platinum(II) (Song et al, 2017; Oberhauser et al, 1998a). The phosphorus atoms of this ligand have been modified to give the corresponding oxide, sulfide and selenide derivatives (Morse et al, 2016; Duncan & Gallagher, 1981; Colquhoun et al, 1979; Aguiar & Daigle, 1964). Structural studies of the parent bisphosphine are relevant to a wide array of researchers. Notes: (a) Yang et al (2007); (b) Oberhauser et al (1998a); (c) Oberhauser et al (1995)
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