Poly[[(μ 2 -4,4′-bipyridyl-κ 2 N : N ′)bis{μ 2 - N -[2-(2-hydroxybenzoyl)carbamothioyl]acetamidato-κ 4 O , N , O ′: S }bis(nitrato-κ 2 O , O ′)dicadmium] dimethylformamide tetrasolvate]

The asymmetric unit of the title complex, {[Cd 2 (C 10 H 10 N 3 O 3 S) 2 (C 10 H 8 N 2 )(NO 3 ) 2 ]·4C 3 H 7 NO} n , consists of one Cd II cation, one N -[2-(2-hydroxybenzoyl)carbamothioyl]acetamidate ligand, half a 4,4′-bipyridyl ligand, one coordinating nitrate anion and two dimethylformamide solvent molecules of crystallization. The bipyridine ligand is completed by inversion symmetry. The metal cation exhibits a distorted pentagonal–bipyramidal coordination geometry provided by two O and one N atoms of the thiosemicarbazide ligand, two O atoms of the nitrate anion, one S atom of a neighbouring thiosemicarbazide ligand and one 4,4′-bipyridine N atom. The bridging role of the thiosemicarbazide ligand through the S atom leads to centrosymmetric binuclear units, which are further linked by 4,4′-bipyridine units, forming polymeric chains extending along the b- axis direction. An intramolecular N—H...O hydrogen bond occurs. The crystal structure also features N—H...O and O—H...O hydrogen bonds, leading to the formation of a three-dimensional network.