title: catena-Poly[[tetra-aqua-[trans-1,2-bis-(4-pyrid-yl)ethene-κN:N']nickel(II)] dinitrate].
abstract: In the title compound, {[Ni(C(12)H(10)N(2))(H(2)O)(4)](NO(3))(2)}(n), the Ni(II) ion, lying on a crystallographic inversion center, has a distorted octa-hedral coordination sphere comprising four water ligands and two N-atom donors from the trans-related 1,2-bis-(4-pyrid-yl)ethene ligands, which also have crystallographic inversion symmetry. These ligands bridge the Ni(II) complex units, forming chains extending along the [110] and [[Formula: see text]10] directions. The nitrate counter-anions stabilize the crystal structure through water-nitrate O-H⋯O hydrogen bonds.
authors.forename: Min Young
authors.initials: MY
authors.lastname: Hyun
authors.forename: Pan-Gi
authors.initials: PG
authors.lastname: Kim
authors.forename: Cheal
authors.initials: C
authors.lastname: Kim
authors.forename: Youngmee
authors.initials: Y
authors.lastname: Kim