(2,2′-Bipyridine-κ(2) N,N′)bis­(4-hydroxy­benzoato-κ(2) O,O′)lead(II) monohydrate

The reaction of lead acetate, 4-hydroxy­benzoic acid and 2,2′-bipyridine in aqueous solution gave the title complex, [Pb(C(7)H(5)O(3))(2)(C(10)H(8)N(2))]·H(2)O. The asymmetric unit contains one Pb(II) atom, two 4-hydroxy­benzoate ligands, one 2,2′-bipyridine ligand and one uncoordinated water mol­ecule. The Pb(II) atom is hexa­coordinated in a distorted tetra­gonal-bipyramidal geometry and is chelated by four carboxyl­ate O atoms and two N atoms. O—H⋯O hydrogen-bonding inter­actions, involving the uncoordinated water, the carboxyl­ate O atoms and hydr­oxy O atoms, produce a three-dimensional supra­molecular structure.