Poly[[bis(1H-imidazole-κN3)cadmium(II)]-μ3-benzene-1,3-dioxyacetato]

Each seven-coordinate CdII atom in the title coordination polymer, poly­[[bis(1H-imidazole-κN3)­cadmium(II)]-μ3-m-phenyl­enebis­(oxy­acetato)], [Cd(1,3-BDOA)(C3H4N2)2]n (1,3-BDOA2− is the benzene-1,3-dioxy­acetate dianion, C10H8O6), displays a distorted monocapped octahedral coordination geometry, defined by two N atoms from the imidazole ligands and five O atoms from three 1,3-BDOA2− anions. Adjacent CdII atoms are bridged by two 1,3-BDOA2− ligands, forming a one-dimensional double-chain structure, with Cd⋯Cd separations of 4.014 (3) A across the double chain and 13.105 (2) A along the chain. A network of N—H⋯O interchain hydrogen bonds is also present.