Poly[[(μ2-4,4′-bipyridyl-κ2 N:N′)bis­{μ2-N-[2-(2-hy­droxy­benzo­yl)carbamo­thio­yl]acetamidato-κ4 O,N,O′:S}bis­(nitrato-κ2 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.