title: Bis(μ-4-nitro-phthalato)bis-[diaqua-(1,10-phenanthroline)manganese(II)].
abstract: 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 octa-hedral geometry and is coordinated by a chelating 1,10-phenanthroline ligand, two monodentate carboxyl-ate anions from two 4-nitro-phthalates and two coordinated water mol-ecules. The two Mn(II) ions in the mol-ecule are bridged by two 4-nitro-phthalate anions, both in a bis-monodentate mode, which finally leads to the formation of the binuclear unit. Intra-molecular O-H⋯O hydrogen bonds between the coordinated and uncoordinated O atoms of one monodentate carboxyl-ate group and the corresponding coordinated water mol-ecules result in an eight-membered and two six-membered rings. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the dinuclear mol-ecules into supra-molecular chains propagating parallel to [100].
authors.forename: Bi-Yi
authors.initials: BY
authors.lastname: Xu
authors.forename: Ting
authors.initials: T
authors.lastname: Xie
authors.forename: Sheng-Jun
authors.initials: SJ
authors.lastname: Lu
authors.forename: Bin
authors.initials: B
authors.lastname: Xue
authors.forename: Wei
authors.initials: W
authors.lastname: Li