Bis(mu-pyridine-2,6-carboxylato-O,N, O':O)bis[triaquamanganese(II)]-pyridine-2,6-dicarboxylic acid (1/2).

In the structure of the title compound, [Mn(2)(C(7)H(3)NO(4))(2)(H(2)O)(6)].2C(7)H(5)NO(4), a centrosymmetric dinuclear complex, hexaaaquabis(pyridine-2, 6-dicarboxylato)dimanganese(II) and free pyridine-2,6-dicarboxylic acid are present in a 1:2 ratio. In the complex, each Mn(2+) ion is coordinated by three O atoms and one N atom from the pyridine-2, 6-dicarboxylate ligands and by three water O atoms, resulting in a distorted pentagonal bipyramidal coordination. Within the centrosymmetric dinuclear complex, two Mn(2+) ions are bridged by two carboxylate O atoms. The crystal structure is stabilized by hydrogen bonds involving all the H atoms of the water ligands.