(2,2′-Bipyridine-κ2N,N′)bis(4-hydroxybenzoato-κ2O,O′)lead(II) monohydrate

The reaction of lead acetate, 4-hydroxybenzoic acid and 2,2′-bipyridine in aqueous solution gave the title complex, [Pb(C7H5O3)2(C10H8N2)]·H2O. The asymmetric unit contains one PbII atom, two 4-hydroxybenzoate ligands, one 2,2′-bipyridine ligand and one uncoordinated water molecule. The PbII 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.