Received 28 November 2011
The title compound, [PtCl2(C21H33P)2]·C3H6O, crystallizes with an accompanying acetone solvent molecule. The metal atom shows a distorted square-planar coordination environment, with a P-Pt-P angle of 172.41 (3)° as the most prominent feature. Both isopropyl fragments were treated as disordered over two conformations with occupancy ratios of 0.55 (2):0.45 (2) and 0.58 (2):0.42 (2). The solvent molecule was also disordered over two orientations in a 1:1 ratio. The crystal studied was a non-merohedral twin with a twin component of 32.4%.
For background to our investigation of the steric and electronic effects of group 15 ligands, see Roodt et al. (2003); Muller et al. (2006, 2008). Examples of the packing disorder observed in Vaska-type complexes of Rh, Ir, Pd and Pt are given by Chen et al. (1991), Kuwabara & Bau (1994), Otto et al. (2000) and Otto (2001), respectively. For examples of Pt complexes with phosphorus ligands in a trans orientation, see: Otto & Roodt (1997); Johansson et al. (2000) and for examples of Pt complexes with phosphorus ligands in a cis orientation, see: Otto & Muller (2001), Otto & Johansson (2001). For the analogous Rh complex containing a dicyclohexyl(4- isopropylphenyl)phosphane ligand, see: Makhoba et al. (2011). For a description of the Cambridge Structural Database, see: (Allen, 2002). For background to cone angles, see: Tolman (1977). The twinned crystal was indexing using the CELL_NOW program (Bruker, 2008).
Data collection: APEX2 (Bruker, 2011); cell refinement: SAINT (Bruker, 2008); data reduction: SAINT and XPREP (Bruker, 2008); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CV5210 ).
Research funds of the University of Johannesburg is gratefully acknowledged.
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