Poly[[(μ2-4,4'-bipyridyl-κ(2) N:N')bis-{μ2-N-[2-(2-hy-droxy-benzo-yl)carbamo-thio-yl]acetamidato-κ(4) O,N,O':S}bis-(nitrato-κ(2) O,O')dicadmium] di-methyl-formamide tetra-solvate].

The asymmetric unit of the title complex, {[Cd2(C10H10N3O3S)2(C10H8N2)(NO3)2]·4C3H7NO} n , consists of one Cd(II) cation, one N-[2-(2-hy-droxy-benzo-yl)carbamo-thio-yl]acetamidate ligand, half a 4,4'-bipyridyl ligand, one coordinating nitrate anion and two di-methyl-formamide solvent mol-ecules of crystallization. The bipyridine ligand is completed by inversion symmetry. The metal cation exhibits a distorted penta-gonal-bipyramidal coordination geometry provided by two O and one N atoms of the thio-semicarbazide ligand, two O atoms of the nitrate anion, one S atom of a neighbouring thio-semicarbazide ligand and one 4,4'-bi-pyridine N atom. The bridging role of the thio-semicarbazide ligand through the S atom leads to centrosymmetric binuclear units, which are further linked by 4,4'-bi-pyridine units, forming polymeric chains extending along the b-axis direction. An intra-molecular 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.