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

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.