title: Crystal structure of poly[[trans-di-aqua-bis-[μ2-trans-4,4'-(diazenedi-yl)dipyridine]-nickel(II)] diiodide ethanol disolvate].
abstract: In the title compound, {[Ni(C10H8N4)2(H2O)2]I2·2C2H5OH} n , the complex shows an octa-hedral environment of the Ni(2+) cation in which it is located on a centre of symmetry, linked to two water mol-ecules and the pyridine-N atoms of four 4,4'-(diazenediyl)dipyridine ligands bridging Ni(2+) cations along the b- and c-axis directions, giving rise to a two-dimensional arrangement. The Ni-N bond lengths are in the range 2.109 (4)-2.186 (3) Å and the Ni-O bond length is 2.080 (3) Å. The 4,4'-(diazenedi-yl)dipyridine ligand lies on an inversion centre. An O-H⋯O hydrogen-bond inter-action is observed between water and ethanol mol-ecules. The I(-) ions can be regarded as free anions in the crystal lattice.
authors.affiliation: Departamento de Química Inorgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Spain.
authors.forename: Josefina
authors.initials: J
authors.lastname: Perles
authors.affiliation: Departamento de Química Inorgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Spain.
authors.forename: Miguel
authors.initials: M
authors.lastname: Cortijo
authors.affiliation: Departamento de Química Inorgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Spain.
authors.forename: Santiago
authors.initials: S
authors.lastname: Herrero
keywords: bidimensional MOF; cationic network; crystal structure; nickel coordination compound