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

Abstract

The hydrothermal synthesis and crystal structure of the title two-dimensional coordination polymer, poly[bis(μ3-3,4-diaminobenzoato-κ3 N 3,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.