title: μ-Oxalato-κ(4)O(1),O(2):O(1'),O(2')-bis-[aqua-(2,2'-bipyridine-κN)(nitrato-κ(2)O,O')lead(II)].
abstract: The title compound, [Pb(2)(C(2)O(4))(NO(3))(2)(C(10)H(8)N(2))(2)(H(2)O)(2)], was synthesized hydro-thermally. The binuclear complex mol-ecule is centrosymmetric, the inversion centre being located at the mid-point of the oxalate C-C bond. The Pb(II) ion is hepta-coordinated by the O atom of one water mol-ecule, two oxalate O atoms, two nitrate O atoms and two 2,2'-bipyridine N atoms, forming an irregular coordination environemnt. Inter-molecular O-H⋯O hydrogen bonds between water mol-ecules and oxalate and nitrate ions result in the formation of layers parallel to (010). π-π inter-actions between pyridine rings in adjacent layers, with centroid-centroid distances of 3.584 (2) Å, stabilize the structural set-up.
authors.affiliation: College of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006,  People's Republic of China.
authors.forename: Gang-Hong
authors.initials: GH
authors.lastname: Pan
authors.forename: Jin-Niu
authors.initials: JN
authors.lastname: Tang
authors.forename: Zhong-Jing
authors.initials: ZJ
authors.lastname: Huang
authors.forename: Long
authors.initials: L
authors.lastname: Li
authors.forename: Chun-Mei
authors.initials: CM
authors.lastname: Zhang