2,5-Diaminothiophene-3,4-dicarbonitrile

In the title compound, C6H4N4S, the planar molecule lies across a crystallographic mirror plane. In the crystal, the molecules form centrosymmetric dimers through cyclic amino N—H...N hydrogen-bonding associations with cyano N-atom acceptors [graph set R22(12)] and these dimers are extended through amine–cyano N—H...N associations into a three-dimensional network