Bis(μ-4-nitro­phthalato)bis­[diaqua­(1,10-phenanthroline)manganese(II)]

In the title compound, [Mn(2)(C(8)H(3)NO(6))(2)(C(12)H(8)N(2))(2)(H(2)O)(4)], the Mn(II) atom in the centrosymmetric binuclear unit has a distorted octa­hedral geometry and is coordinated by a chelating 1,10-phenanthroline ligand, two monodentate carboxyl­ate anions from two 4-nitro­phthalates and two coordinated water mol­ecules. The two Mn(II) ions in the mol­ecule are bridged by two 4-nitro­phthalate anions, both in a bis-monodentate mode, which finally leads to the formation of the binuclear unit. Intra­molecular O—H⋯O hydrogen bonds between the coordinated and uncoordinated O atoms of one monodentate carboxyl­ate group and the corresponding coordinated water mol­ecules result in an eight-membered and two six-membered rings. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds link the dinuclear mol­ecules into supra­molecular chains propagating parallel to [100].