Date Published: February 01, 2012
Publisher: International Union of Crystallography
Author(s): Na Wang, Jin-Guo Wang, An-Jie Min, Yao-Wen Fu.
The title ion-pair compound, (C7H7N2)2[Cu(C4N2S2)2], was obtained by the direct reaction of CuCl2·2H2O, disodium maleonitriledithiolate (Na2mnt) and 4-cyano-1-methylpyridinium iodide. The anion and one pyridinium cation lie entirely on a mirror plane, whereas for the other cation, a crystallographic mirror plane runs through the N and para-C atoms of the pyridine ring, the methyl C atom, and the cyano group. In the crystal, ions are linked into a three-dimensional network by C—H⋯N hydrogen bonds.
For details of other square-planar M(dithiolene)2 complexes, see: Robin & Fromm (2006 ▶); Nishijo et al. (2003 ▶); Robertson & Cronin (2002 ▶); Coomber et al. (1996 ▶); Duan et al. (2010 ▶). For a study on CN⋯π interactions, see: Tian et al. (2007 ▶).