Poly[[(2,2'-bipyridine)-(μ(3)-2-sulfonatobenzoato)lead(II)] dihydrate].

In the title compound, {[Pb(sbc)(bpy)]·2H(2)O}(n) [bpy is 2,2'-bipyridine (C(10)H(8)N(2)) and sbc is the 2-sulfonatobenzoate dianion (C(7)H(4)O(5)S)], the Pb(II) ion is bonded to four O atoms including carboxyl-ate and sulfonate from three sbc dianions, and two N atoms from a chelating 2,2'-bipyridine ligand. The sbc ligand acts as a μ(3)-bridging ligand by one O atom of the sulfonate group and the two O atoms of the carboxyl-ate. Of these two last O atoms, one builds up a dinuclear framework arranged around an inversion center whereas the second one links each dinuclear unit, forming a chain extending along the b axis. These polymeric chains are linked through O-H⋯O hydrogen bonds involving the water mol-ecules, forming a layer parallel to (10).