catena-Poly[[[triaqua­manganese(II)]-μ-4,4′-bipyridine-κ(2) N:N′-[triaqua­manganese(II)]-μ-pyrimidine-4,6-dicarboxyl­ato-κ(4) N (1),O (6):N (3),O (4)] 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) octa­hedral coordination geometries, with the pyrimidine-4,6-dicarboxyl­ate (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 mol­ecules. As a consequence, cationic chains of [Mn(2)(μ-pmdc)(μ-4,4′-bpy)(H(2)O)(6)](2+) are generated, which extend approximately along the a axis. Sulfate counter-anions and three uncoordinated water mol­ecules complete the structure, which is stabilized by multiple O—H⋯O hydrogen-bonding inter­actions between the structural units.