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

Abstract

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.