title: 3-(4-Acetylphenyl)-1-(4-nitrophenyl)triazene.
abstract: The crystal structure of the title compound, C(14)H(12)N(4)O(3), shows that the stereochemistry about the N=N double bond of the N=N-N(H) moiety is trans. The whole molecule is almost planar (r.m.s. deviation = 0.0654 A), the interplanar angle between the phenyl rings being 0.7 (1) degrees and the largest interplanar angle being that between the phenyl ring and the nitro group of the 4-nitrophenyl substituent [11.5 (2) degrees ]. Intermolecular N-H.O interactions between molecules related by translation give rise to chains along the [110] and [1-10] directions, and these chains are held together by N.O pi-pi interactions. An unequal distribution of the double-bond character among the N atoms suggests a delocalization of pi electrons over the diazoamine group and the adjacent aryl substituents.
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: Almir Luis
authors.initials: AL
authors.lastname: Brancher
authors.forename: Angela
authors.initials: A
authors.lastname: Silva
authors.forename: Jairo
authors.initials: J
authors.lastname: Bordinhao
authors.forename: Cäcilia M
authors.initials: CM
authors.lastname: Mössmer