Bis(benzoato-κ2 O,O′)(2,2′-bipyridine-κ2 N,N′)lead(II) benzoic acid monosolvate

The reaction of lead acetate, benzoic acid and 2,2'-bipyridine (bipy) in aqueous solution yielded the title complex, [Pb(C(7)H(5)O(2))(2)(C(10)H(8)N(2))]·C(7)H(6)O(2). The asymmetric unit contains two independent complex mol-ecules as well as two independent benzoic acid solvent mol-ecules, one of which is disordered over two positions with almost equal occupancies [0.504 (5) and 0.496 (5)]. The two complex mol-ecules have similar configurations with the hexa-coordinated environment of the Pb(II) atom formed by four carboxyl-ate O atoms of two chelate benzoate ligands and two N atoms of the bipy ligand. The Pb-O bonds involving one of the benzoate ligands are almost coplanar with Pb-N bonds to the bipy ligand [dihedral angles of 12.67 (11) and 14.73 (11)°] ; if the second benzoate ligand is treated as one coordination site, the overall coordination may be represented as a distorted pseudo-square pyramid. Weak inter-molecular Pb⋯O inter-actions [3.046 (3) and 3.359 (3) Å] link each of the complex mol-ecules into two symmetry-independent centrosymmetric dimers. Hydrogen bonds involving the carboxyl H atoms of solvent benzoic acid mol-ecules and metal-coordinated carboxyl-ate O atoms link complex mol-ecules and benzoic acid solvent mol-ecules into insular aggregates.