title: 4-Nitro-N^2^-(pyridin-4-ylmethylidene)benzene-1,2-diamine.
abstract: In the title compound, C12H10N4O2, the dihedral angle between the aromatic rings is 43.18 (16)°. The nitro group is rotated from its attached ring by 7.8 (2)° and a short intra-molecular N-H⋯N contact occurs. In the crystal, the mol-ecules are linked by N-H⋯N and C-H⋯O hydrogen bonds, generating a three-dimensional network.
authors.affiliation: College of Science, Nanjing University of Technology, Xinmofan Road No.5 Nanjing, Nanjing 210009, People's Republic of China.
authors.forename: Guang-Lin
authors.initials: GL
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Sun
authors.forename: Jing-Chao
authors.initials: JC
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Mei
authors.forename: Cheng
authors.initials: C
authors.lastname: Guo
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references.pmid: 19171970
references.citation: Angew Chem Int Ed Engl. 2009;48(50):9461-4
references.pmid: 19904786