Crystal structure of poly[bis(μ-2-amino-4,5-dicyanoimidazolato-κ2N1:N3)-trans-bis(N,N′-dimethylformamide-κO)cadmium]

Abstract

In the title structure, [Cd(C5H2N5)2(C3H7NO)2]nor [Cd(adci)2(DMF)2]n, the Cd2+ion is located on a twofold rotation axis and is six-coordinated in a CdN4O2manner 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-relatedN,N-dimethylformamide (DMF) ligands in axial positions. The adci−anions bridge adjacent Cd2+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.