Bis(4-amino-1-hexylpyridinium) bis(1,2-dicyanoethene-1,2-dithiolato)cuprate(II)

The complete complex anion in the title salt, (C(11)H(19)N(2))(2)[Cu(C(4)N(2)S(2))(2)], has 2/m symmetry while the complete cation is generated by mirror symmetry with the non-H atoms of the alkyl chain lying on the plane. A square-planar geometry based on an S(4) donor set is found in the anion; the Cu—S distance is 2.2663 (5) Å. In the crystal, inter­molecular N—H⋯N hydrogen bonds link the ions into layers in the bc plane comprising alternating rows of cations and anions.