Poly[[diaqua­tetra­kis­(μ(2)-benzene-1,4-di­carbonitrile-κ(2) N:N′)iron(II)] bis­[tetra­chlorido­ferrate(III)] nitro­methane tetra­solvate]

In the title compound, {[Fe(II)(C(8)H(4)N(2))(2)(H(2)O)(2)][Fe(III)Cl(4)](2)·4CH(3)NO(2)}(n), the Fe(II) and Fe(III) ions are hexa- and tetra­coordinated, respectively. Each unique benzene-1,4-dicarbonitrile mol­ecule lies across a crystallographic inversion centre and bridges two Fe(II) ions (each situated on an inversion centre), generating two-dimensional (4,4) square grid layers. The tetra­chloridoferrate(III) anions and nitro­methane solvent mol­ecules lie between the square grid layers and are further link to the adjacent layers into a three-dimensional supra­molecular structure through O—H⋯Cl and O—H⋯O hydrogen bonds.