Hydro­thermal synthesis and crystal structure of poly[bis­(μ3-3,4-di­amino­benzoato)manganese], a layered coordination polymer

The hydro­thermal synthesis and crystal structure of the title two-dimensional coordination polymer, poly[bis­(μ3-3,4-di­amino­benzoato-κ3N3,O,O′)manganese(II)], [Mn(C7H7N2O2)2]n, are described. The Mn2+ cation (site symmetry \overline{1}) adopts a tetra­gonally elongated trans-MnN2O4 octa­hedral coordination geometry and the μ3-N,O,O′ ligand (bonding from both carboxyl­ate O atoms and the meta-N atom) links the metal ions into infinite (10\overline{1}) layers. The packing is consolidated by intra-layer N—H⋯O and inter-layer N—H⋯N hydrogen bonds. The structure of the title compound is compared with other complexes containing the C7H7N2O2− anion and those of the related M(C8H8NO2)2 (M = Mn, Co, Ni, Zn) family, where C8H8NO2− is the 3-amino-4-methyl­benzoate anion.