Crystal structure of poly[bis­(μ-2-amino-4,5-di­cyano­imidazolato-κ(2) N (1):N (3))-trans-bis­(N,N′-di­methyl­formamide-κO)cadmium]

In the title structure, [Cd(C(5)H(2)N(5))(2)(C(3)H(7)NO)(2)](n) or [Cd(adci)(2)(DMF)(2)](n), the Cd(2+) ion is located on a twofold rotation axis and is six-coordinated in a CdN(4)O(2) manner by four imidazole N atoms of four symmetry-related 2-amino-4,5-di­cyano­imidazolate (adci) anions in the equatorial plane and by two O atoms of symmetry-related N,N-di­methyl­formamide (DMF) ligands in axial positions. The adci(−) anions bridge adjacent Cd(2+) ions [shortest Cd⋯Cd separation = 6.733 (3) Å] into a layered coordination polymer extending parallel to (001). The primary amino group and the non-coordinating cyano groups of adci(−) anions are involved in hydrogen-bonding inter­actions with DMF ligands to stabilize the crystal structure.