Tetra­aqua­bis­(6-chloro­pyridine-3-carboxyl­ato-κO)nickel(II) tetra­hydrate

In the title compound, [Ni(C(6)H(3)ClNO(2))(2)(H(2)O)(4)]·4H(2)O, the Ni(II) ion is located on an inversion centre and is octa­hedrally coordinated by four O atoms from four water mol­ecules in the equatorial plane and two O atoms of two 6-chloro-3-carboxyl­ate ligands in axial positions. There are also four lattice water molecules present. The organic ligands are bound to the Ni(II) ion in a monodentate manner through a carboxyl­ate O atom. There is one strong intra­molecular O—H⋯O hydrogen bond and six inter­molecular O—H⋯O and O—H⋯N hydrogen-bonding inter­actions in the packing, resulting in a complex three-dimensional network structure.