catena-Poly[[trans-diaquamanganese(II)]-di-μ-3-pyridylacetato]

The title manganese(II) coordination polymer, [Mn(C7H6NO2)2(H2O)2] n , which was obtained from a solvothermal reaction of 3-pyridylacetic acid hydro-chloride with Mn(ClO4)2·6H2O, is centrosymmetric, so pairs of equivalent ligands lie trans to each other in a slightly distorted octa-hedral geometry such that the MnII center is coordinated by two pyridyl N atoms [Mn - N = 2.287 (4) Å], two carboxyl-ate O atoms [Mn - O = 2.129 (3) Å] and two water mol-ecules [Mn - O = 2.179 (3) Å]. Each unit is further extended into two-dimensional sheets with a rhombic grid through sharing MnII ions, 3-pyridylacetate anionic ligands and intra-molecular O - H⋯O hydrogen bonds with angles at hydrogen of 147°. Adjacent two-dimensional layers are connected via inter-molecular O - H⋯O and weak C - H⋯O hydrogen-bonding contacts, resulting in a three-dimensional framework with oxygen as a trifurcated acceptor atom. © 2007 International Union of Crystallography. All rights reserved.