title: trans-Bis[1-methyl-3-(p-nitrophenyl)triazenido 1-oxide-kappa2N3,O]dipyridinenickel(II).
abstract: In the centrosymmetric title complex, [Ni(C(7)H(7)N(4)O(3))(2)(C(5)H(5)N)(2)], the coordination geometry about the Ni(2+) ion is octahedral, with two deprotonated 1-methyl-3-(p-nitrophenyl)triazenide 1-oxide ions, viz. [O(2)NC(6)H(4)NNN(O)CH(3)](-), acting as bidentate ligands (four-electron donors). Two neutral pyridine (py) molecules complete the coordination sphere in positions trans to each other. The triazenide 1-oxide ligand is almost planar, the largest interplanar angle of 8.80 (12) degrees being between the phenyl ring of the p-nitrophenyl group and the plane defined by the N(3)O moiety. The Ni-N(triazenide), Ni-O and Ni-N(py) distances are 2.0794 (16), 2.0427 (13) and 2.1652 (18) A, respectively.
authors.affiliation: Departamento de Quimica, Universidade Federal de Santa Maria, Caixa Postal 5071, 97110-970 Santa Maria, RS, Brazil. hoerner@base.ufsm.br
authors.forename: Manfredo
authors.initials: M
authors.lastname: Hörner
authors.forename: Julieta Saldanhade
authors.initials: JS
authors.lastname: Oliveira
authors.forename: Jairo
authors.initials: J
authors.lastname: Bordinhao
authors.forename: Johannes
authors.initials: J
authors.lastname: Beck