Research Article: Bis(4-cyano-1-methyl­pyridinium) bis­(1,2-dicyano­ethene-1,2-dithiol­ato-κ2S,S′)cuprate(II)

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.

Partial Text

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 ▶).