title: Bis(2-nitro-phen-yl)methane.
abstract: In the title compound, C13H10N2O4, the nitro groups are twisted significantly relative to the benzene rings [dihedral angles = 16.64 (18) and 28.02 (11)°]. The benzene groups are nearly perpendicular to each other [dihedral angle = 87.72 (6)°]. Short inter-molecular N⋯O and C⋯O [2.981 (2) and 3.060 (2) Å, respectively] contacts suggest possible weak π-inter-actions between nitro groups and between benzene and nitro groups. In addition, there are π-π inter-actions between one benzene group and an inversion-related equivalent [inter-planar separation = 3.494 (2) Å].
authors.affiliation: Department of Chemistry and Biochemistry, St Catherine University, 2004 Randolph Avenue, St Paul, MN 55105, USA.
authors.forename: Daron E
authors.initials: DE
authors.lastname: Janzen
authors.affiliation: Department of Chemistry and Biochemistry, St Catherine University, 2004 Randolph Avenue, St Paul, MN 55105, USA.
authors.forename: Laura E
authors.initials: LE
authors.lastname: Crepeau
authors.affiliation: Department of Chemistry and Biochemistry, St Catherine University, 2004 Randolph Avenue, St Paul, MN 55105, USA.
authors.forename: Benjamin D
authors.initials: BD
authors.lastname: Hageseth
authors.affiliation: Department of Chemistry and Biochemistry, St Catherine University, 2004 Randolph Avenue, St Paul, MN 55105, USA.
authors.forename: James W
authors.initials: JW
authors.lastname: Wollack
keywords: crystal structure