[2-Carboxy-4-(4-carboxy-3-carboxylatobenzoyl)benzoato]bis(1,10-phenanthroline)cobalt(II) monohydrate

In the title compound, [Co(C12H8N2)2(C17H8O9)]·H2O, the Co atom is octahedrally coordinated by four N atoms from two 1,10-phenanthroline (phen) ligands and two O atoms from the 2-carboxy-4-(4-carboxy-3-carboxylatobenzoyl)benzoate ligand. O...H...O hydrogen bonds link this discrete structure into a one-dimensional chain.