Open AccessCis / trans isomers of Pt X 2 L 2 ( X = halogen, L = neutral ligand); the crystal structure of trans ‐dichlorobis(dimethyl sulfide)platinum(II) and the pressure dependence of its unit‐cell dimensions
Author(s) -
Hansson Christian,
Carlson Stefan,
Giveen Deborah,
Johansson Maria,
Yong Shen,
Oskarsson Åke
Publication year - 2006
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
eISSN - 1600-5740
pISSN - 0108-7681
DOI - 10.1107/s0108768106004629
Subject(s) - crystallography , chemistry , ligand (biochemistry) , group (periodic table) , intermolecular force , melting point , halogen , derivative (finance) , crystal structure , stereochemistry , molecule , biochemistry , alkyl , receptor , organic chemistry , economics , financial economics
trans ‐PtCl 2 (dms) 2 (dms is dimethyl sulfide) crystallizes in the space group P 2 1 / n and adopts the molecular point group C i , which is the most frequently occurring point group for trans ‐Pt X 2 L 2 complexes (78%), as observed in the Cambridge Structural Database (CSD; 2005 release), followed by C 1 (16%). Density functional theory calculations show that the observed geometry for trans ‐PtCl 2 (dms) 2 has slightly higher energy than the most favorable geometry in the point group C 2 h , but this geometry would require a space group that hampers close packing, thus showing that intermolecular forces determine the point group for the title compound. High‐pressure powder diffraction studies of trans ‐PtCl 2 (dms) 2 show no phase transformation up to 8.0 GPa. The bulk modulus is 8.1 (6) GPa and the pressure derivative 8.1 (4). In the CSD, the number of cis ‐ and trans ‐Pt X 2 L 2 compounds are almost equal, viz. 156 cis and 160 trans compounds, showing no preference for either isomer in the solid state.