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.