title: 3-Nitro-4-(propyl-amino)-benzonitrile.
abstract: In the title compound, C(10)H(11)N(3)O(2), the nitro group is essentially coplanar with the aromatic ring [dihedral angle = 1.3 (3)°] and forms an intra-molecular amine-nitro N-H⋯O hydrogen bond. In the crystal, weak inter-molecular aromatic C-H⋯O(nitro) hydrogen bonds link the mol-ecules. Weak aromatic ring π-π inter-actions [minimum ring centroid separation = 3.7744 (13) Å] are also present.
authors.affiliation: Department of Biological and Chemical Engineering, Chien-shiung Institute of Technology, Taicang 215411, Suzhou,  People's Republic of China.
authors.forename: Shang-Lian
authors.initials: SL
authors.lastname: Liu
authors.forename: Hong-Sheng
authors.initials: HS
authors.lastname: Jia