Bis{1-[(1H-benzimidazol-1-yl)meth­yl]-1H-imidazole-κN³}bis­(3,5-dicarb­oxy­benzoato-κ²O¹,O^1′)nickel(II) octa­hydrate

In the title complex, [Ni(C₉H₅O₆)₂(C₁₁H₁₀N₄)₂]·8H₂O, the Ni^II ion exhibits site symmetry 2. It has a distorted octa­hedral coordination defined by two N atoms from two symmetry-related 1-[(1H-benzimidazol-1-yl)meth­yl]-1H-imidazole ligands and four O atoms from two symmetry-related 3,5-dicarb­oxy­benzoate anions. In the crystal, the complex mol­ecules and solvent water mol­ecules are linked via O—H...O, O—H...N and N—H...O hydrogen bonds, forming a three-dimensional structure. There are also a number of C—H...O inter­actions present.