title: catena-Poly[[diaqua-nickel(II)]-bis-(μ-pyridine-4-sulfinato)-κN,O;κO,N].
abstract: In the title coordination polymer, [Ni(C(5)H(4)NO(2)S)(2)(H(2)O)(2)](n), the Ni(II) ion is located on an inversion centre and is octa-hedrally coordinated by two N and two O atoms of four symmetry-related and deprotonated pyridine-4-sulfinate (ps) ligands together with two water mol-ecules in axial positions. The ps(-) anions, acting as μ(2)-bridging ligands, link neighbouring Ni(II) ions into a chain structure along the c axis. These polymeric chains are extended into a three-dimensional framework via inter-molecular O-H⋯O hydrogen bonds with participation of the water mol-ecules.
authors.affiliation: Department of Chemistry, Luoyang Normal University, Luoyang, Henan 471022, People's Republic of China.
authors.forename: Zhong-Xiang
authors.initials: ZX
authors.lastname: Du
authors.forename: Su-Ning
authors.initials: SN
authors.lastname: Ji