(2,2'-Bipyridine-κN,N')bis-(4-hydroxy-benzoato-κO,O')lead(II) monohydrate.

The reaction of lead acetate, 4-hydroxy-benzoic 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-hydroxy-benzoate ligands, one 2,2'-bipyridine ligand and one uncoordinated water mol-ecule. The Pb(II) atom is hexa-coordinated in a distorted tetra-gonal-bipyramidal geometry and is chelated by four carboxyl-ate O atoms and two N atoms. O-H⋯O hydrogen-bonding inter-actions, involving the uncoordinated water, the carboxyl-ate O atoms and hydr-oxy O atoms, produce a three-dimensional supra-molecular structure.