title: 3-tert-Butyl-1-(3-nitro-phen-yl)-1H-pyrazol-5-amine.
abstract: In the title compound, C(13)H(16)N(4)O(2), the pyrazole ring forms a dihedral angle of 50.61 (6)° with the 3-nitro-phenyl ring. The plane of the nitro group is twisted by 6.8 (7)° out of the plane of the phenyl ring. In the crystal, the mol-ecules are linked by N-H⋯N and N-H⋯O hydrogen bonds, forming sheets in the bc plane. In addition, a weak C-H⋯N inter-action is observed.
authors.affiliation: Instituto de Química, Universidad Nacional Autónoma de México, circuito exterior, ciudad universitaria, México 04510,  México.
authors.forename: Simón
authors.initials: S
authors.lastname: Hernández-Ortega
authors.forename: Fernando
authors.initials: F
authors.lastname: Cuenú-Cabezas
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Abonia-González
authors.forename: Armando
authors.initials: A
authors.lastname: Cabrera-Ortiz