Poly[aqua­[μ(2)-cis-1,2-bis­(4-pyrid­yl)ethyl­ene-κ(2) N:N′](μ(2)-5-nitro­isophthalato-κ(3) O:O′,O′′)nickel(II)]

In the title compound, [Ni(C(8)H(3)NO(6))(C(12)H(10)N(2))(H(2)O)](n), the Ni(II) atom is octa­hedrally coordinated by two cis N atoms from two different 1,2-bis­(4-pyrid­yl)ethyl­ene (bpe) ligands, two O atoms from one chelating carboxyl group of the 5-nitro­isophthalic acid (nip) ligand, one O atom from another monodentate nip ligand and one O atom from a water mol­ecule, forming a three-dimensional network structure. Inter­molecular O—H⋯O hydrogen bonding stabilizes this arrangement. The asymmetric unit of the structure contains one Ni(II) atom, one water mol­ecule, one nip ligand and two half-mol­ecules of the bpe ligand with an inversion centre at the mid-point of the central C=C bond.