title: Poly[diaqua-(μ-oxalato)(μ-2-oxido-pyridinium-3-carboxyl-ato)praseo-dymium(III)].
abstract: In the title complex, [Pr(C(6)H(4)NO(3))(C(2)O(4))(H(2)O)(2)](n), each Pr(III) ion is coordinated by eight O atoms from two 2-oxynicotinate ligands, two oxalate ligands and two water mol-ecules, displaying a distorted bicapped square-anti-prismatic geometry. The carboxyl-ate groups link adjacent praseodymium metal centres, forming layers parallel to the bc plane. The crystal packing is stabilized by inter-molecular O-H⋯O and N-H⋯O hydrogen bonds.
authors.affiliation: College of Chemistry and Environmental Engineering, Dongguan University of Technology, Dongguan 523808, Guangdong, People's Republic of China.
authors.forename: Yong-Jun
authors.initials: YJ
authors.lastname: Xu
authors.forename: Xiao-Xi
authors.initials: XX
authors.lastname: Yang
authors.forename: Hong-Bin
authors.initials: HB
authors.lastname: Zhao