Diaqua­[5,5′-dicarb­oxy-2,2′-(ethane-1,2-di­yl)bis­(1H-imidazole-4-carboxyl­ato)]cobalt(II)

In the title complex, [Co(C(12)H(8)N(4)O(8))(H(2)O)(2)], the Co(II) atom is coordinated by two N and two O atoms of the tetra­dentate 5,5′-dicarb­oxy-2,2′-(ethane-1,2-di­yl)bis­(1H-imidazole-4-carboxy­l­ate) anion. The slightly distorted octa­hedral coordination environment is completed by the O atoms of two water mol­ecules in axial positions. An intra­molecular O—H⋯O hydrogen bond between the carb­oxy and carboxyl­ate groups stabilizes the mol­ecular configuration. Adjacent mol­ecules are linked through O—H⋯O and N—H⋯O hydrogen bonds between the carb­oxy/carboxyl­ate groups, water mol­ecules and imidazole fragments into a three-dimensional network.