Open AccessA dynamic disorder‐linked reversible phase transition in a new chloroform solvate of cis ‐dichloridobis(triethylphosphane)platinum(II)
Author(s) -
Dillon Keith B.,
Howard Judith A. K.,
Monks Philippa K.,
Probert Michael R.,
Shepherd Helena J.
Publication year - 2011
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
eISSN - 1600-5759
pISSN - 0108-2701
DOI - 10.1107/s0108270111008353
Subject(s) - monoclinic crystal system , crystallography , orthorhombic crystal system , chloroform , platinum , chemistry , crystal structure , ligand (biochemistry) , solvent , phase transition , stereochemistry , physics , organic chemistry , catalysis , biochemistry , receptor , quantum mechanics
The title compound, cis ‐dichloridobis(triethylphosphane)platinum(II) chloroform monosolvate, [PtCl 2 (C 6 H 15 P) 2 ]·CHCl 3 , has been obtained from ligand scrambling in the cis ‐[PtCl 2 (Cyp 2 PCl)(PEt 3 )] (Cyp = cyclopentyl) system in CHCl 3 solvent. Unlike the two previously reported unsolvated polymorphs, which are both monoclinic, the compound crystallizes in an orthorhombic setting. Furthermore, the system exhibits a reversible temperature‐dependent structural phase transition, coupling a reduction in anisotropic displacement parameters and a reduction in crystallographic symmetry on cooling. The high‐temperature phase adopts space group Pnma with the complex and solvent molecules sitting across a crystallographic mirror plane ( Z ′ = 0.5). The low‐temperature phase adopts the space group P 2 1 2 1 2 1 with Z ′ = 1.