title: (E)-3,5-Dimethyl-1-p-tolyl-4-(p-tolyl-diazen-yl)-1H-pyrazole.
abstract: There are two independent mol-ecules, A and B, in the asymmetric unit of the title compound, C(19)H(20)N(4), in each of which the N=N double bond has an E conformation. The dihedral angles between the pyrazole ring and the p-tolyl rings in the 1- and 4-positions are 22.54 (8) and 35.73 (7)°, respectively, in mol-ecule A. The corresponding dihedral angles in mol-ecule B are 28.13 (8) and 22.18 (8)°. In the crystal, the A and B mol-ecules are linked by weak C-H⋯π inter-actions, leading to inversion dimers in each case.
authors.forename: Carlos
authors.initials: C
authors.lastname: Bustos
authors.forename: Marcia
authors.initials: M
authors.lastname: Pérez-Cerda
authors.forename: Luis
authors.initials: L
authors.lastname: Alvarez-Thon
authors.forename: Enrique
authors.initials: E
authors.lastname: Barrales-Salcedo
authors.forename: Maria Teresa
authors.initials: MT
authors.lastname: Garland