title: Bis[[aqua-(1H-imidazo[4,5-f][1,10]phenanthroline-κN,N)cadmium]bis-(μ-pyridine-2,3-dicarboxyl-ato)-κN,O:O;κO:N,O].
abstract: In the title compound, [Cd(2)(C(7)H(3)NO(4))(2)(C(13)H(8)N(4))(2)(H(2)O)(2)], the Cd(II) ion is six-coordinated by two N atoms from a 1H-imidazo[4,5-f][1,10]phenanthroline (IP) ligand, one N atom and one O atom from a pyridine-2,3-dicarboxyl-ate (pdc) ligand, one O atom from another pdc ligand and one water mol-ecule in a distorted octa-hedral geometry. Two Cd(II) ions are bridged by a pair of pdc ligands, forming a centrosymmetric dinuclear structure. Neighboring dinuclear units are linked by the coordinated water mol-ecules through O-H⋯N and O-H⋯O hydrogen bonds, forming a layer parallel to (011). The layers are further linked into a three-dimensional network through N-H⋯O hydrogen bonds. π-π inter-actions between the IP ligands further stabilize the supra-molecular structure [centroid-centroid distances = 3.579 (3), 3.686 (3), 3.710 (3), 3.766 (3) and 3.841 (3) Å].
authors.affiliation: College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, Fujian 350007,  People's Republic of China.
authors.forename: Li-Juan
authors.initials: LJ
authors.lastname: Chen
authors.forename: Ming-Xing
authors.initials: MX
authors.lastname: Yang
authors.forename: Hua
authors.initials: H
authors.lastname: Huang
authors.forename: Xiao-Hua
authors.initials: XH
authors.lastname: Chen
authors.forename: Shen
authors.initials: S
authors.lastname: Lin