title: 3,5-Dimethyl-1-(4-nitro-phen-yl)-1H-pyrazole.
abstract: In the title pyrazole derivative, C(11)H(11)N(3)O(2), the benzene ring is twisted [dihedral angle = 31.38 (12)°] with respect to the pyrazole ring (r.m.s. deviation = 0.009 Å). The nitro group is effectively coplanar with the benzene ring to which it is attached [O-N-C-C torsion angle = -6.5 (3)°]. Supra-molecular chains along the b axis are formed owing to π-π inter-actions [3.8653 (2) Å] between translationally related mol-ecules involving both the five- and six-membered rings.
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink
authors.forename: Solange M S V
authors.initials: SM
authors.lastname: Wardell
authors.forename: James L
authors.initials: JL
authors.lastname: Wardell