Bis(2,2',2''-nitrilo-triacetamide-κ(3)O,N,O')nickel(II) dinitrate tetra-hydrate.

In the title compound, [Ni(C(6)H(12)N(4)O(3))(2)](NO(3))(2)·4H(2)O, the Ni(II) cation is located on an inversion center and is N,O,O'-chelated by two nitrilo-tris-(acetamide) mol-ecules in a distorted octa-hedral geometry. The complex cations, nitrate anions and lattice water mol-ecules are connected by O-H⋯O and N-H⋯O hydrogen bonds, forming a three-dimensional supra-molecular structure.