title: 2,5-Diamino-thio-phene-3,4-dicarbonitrile.
abstract: In the title compound, C(6)H(4)N(4)S, the planar mol-ecule lies across a crystallographic mirror plane. In the crystal, the mol-ecules form centrosymmetric dimers through cyclic amino N-H⋯N hydrogen-bonding associations with cyano N-atom acceptors [graph set R(2) (2)(12)] and these dimers are extended through amine-cyano N-H⋯N associations into a three-dimensional network.
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Ziegler
authors.forename: Victor N
authors.initials: VN
authors.lastname: Nemykin