Tris(1,10-phenanthroline-κ(2) N,N′)nickel(II) bis­(2,4,5-tricarb­oxy­benzo­ate) monohydrate

In the title compound, [Ni(C(12)H(8)N(2))(3)](C(10)H(5)O(8))(2)·H(2)O, the Ni(II) cation is coordinated by six N atoms of the three bidentate chelating 1,10-phenanthroline ligands in a slightly distorted octa­hedral coordination geometry. The Ni—N bond lengths range from 2.074 (2) to 2.094 (2) Å. The dihedral angles between the three chelating NCCN groups to each other are 85.71 (3), 73.75 (2) and 85.71 (3)°, respectively. The Ni cation, the phenyl ring of the 1,10-phenanthroline ligand and the lattice water molecule are located on special positions (site symmetry 2). In the crystal, the uncoordinated 2,4,5-tricarb­oxy­benzeno­ate anions join with each other through O—H⋯O hydrogen bonds, forming a two-dimensional hydrogen-bonded layer structure along the bc plane. The layers are further linked via additional O—H⋯O inter­actions between water and carboxyl groups, resulting in a three-dimensional supra­molecular network.