Poly[[(2,2′-bipyridine)(μ3-2-sulfonatobenzoato)lead(II)] dihydrate]

In the title compound, {[Pb(sbc)(bpy)]·2H2O}n [bpy is 2,2′-bipyridine (C10H8N2) and sbc is the 2-sulfonatobenzoate dianion (C7H4O5S)], the PbII ion is bonded to four O atoms including carboxylate and sulfonate from three sbc dianions, and two N atoms from a chelating 2,2′-bipyridine ligand. The sbc ligand acts as a μ3-bridging ligand by one O atom of the sulfonate group and the two O atoms of the carboxylate. 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 molecules, forming a layer parallel to (10overline{2}).