title: A three-dimensional polycatenation framework: catena-poly[[diaquabis(4-{4-[4-(pyridin-4-yl)phenoxy]phenyl}pyridine)nickel(II)]-μ2-naphthalene-2,6-dicarboxylato].
abstract: In the title compound, [Ni(C12H6O4)(C22H16N2O)2(H2O)2]n, the Ni(2+) cation resides on a centre of inversion in a slightly distorted octahedral [N2O4] environment. The two carboxylate groups of each naphthalene-2,6-dicarboxylate (NDC(2-)) ligand, which reside on centres of inversion, link the Ni(II) cations into a one-dimensional chain. Identical chains are linked by intermolecular hydrogen bonds between coordinated water molecules and the uncoordinated N atoms of 4-{4-[4-(pyridin-4-yl)phenoxy]phenyl}pyridine ligands to form (4,4)-topological sheets, and then the different sheets are interlocked in an inclined fashion to give a three-dimensional polycatenation network. The stability of the structure is further enhanced by π-π stacking interactions between pyridine and benzene rings.
authors.affiliation: Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology, Shandong Academy of Sciences Institute of Oceanographic Instrumentation, Qing Dao 266001, People's Republic of China. guocuilian@163.com
authors.forename: Cui-Lian
authors.initials: CL
authors.lastname: Guo
authors.forename: Xiao-Qiang
authors.initials: XQ
authors.lastname: Yao
authors.forename: Yong-Qiang
authors.initials: YQ
authors.lastname: Cheng
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
keywords: crystal structure; nickel complexes; polycatenation networks