catena-Poly[[[triaqua-manganese(II)]-μ-4,4'-bipyridine-κN:N'-[triaqua-manganese(II)]-μ-pyrimidine-4,6-dicarboxyl-ato-κN,O:N,O] sulfate trihydrate].

The two independent Mn(II) ions in the polymeric title compound, {[Mn(2)(C(6)H(2)N(2)O(4))(C(10)H(8)N(2))(H(2)O)(6)]SO(4)·3H(2)O}, exhibit distorted MnN(2)O(4) octa-hedral coordination geometries, with the pyrimidine-4,6-dicarboxyl-ate (pmdc) ligand acting in the bis-chelating μ-(κO,κN:κO',κN') bridging mode and the 4,4'-bipyridine (bpy) ligand in the μ-(κN:κN') bridging mode. The remaining coordination sites are occupied by O atoms of water mol-ecules. As a consequence, cationic chains of Mn(2)(μ-pmdc)(μ-4,4'-bpy)(H(2)O)(6) are generated, which extend approximately along the a axis. Sulfate counter-anions and three uncoordinated water mol-ecules complete the structure, which is stabilized by multiple O-H⋯O hydrogen-bonding inter-actions between the structural units.