Diaquabis(5-carboxy-2-methyl-1H-imidazole-4-carboxylato-κ2N3,O4)-cobalt(II) dimethylformamide disolvate

In the title compound, [Co(C6H5N2O4)(2)(H2O)(2)]center dot 2C(3)H(7)NO, the Co-II ion lies on an inversion center and adopts a slightly distorted CoN2O4 octahedral geometry binding two bidentate chelating 5-carboxy-2-methyl-1H-imidazole-4-carboxylate (H(2)MIDA(-)) monoanionic ligands and two axial aqua ligands. In the crystal structure, intermolecular O-H center dot center dot center dot O hydrogen bonds link neighboring molecules, generating a two-dimensional framework containing eight-membered H4O4 rings. In addition, the dimethylformamide solvent molecules are hydrogen bonded to the two-dimensional framework via the NH groups of the H(2)MIDA(-) ligands.