title: N-Methyl-N-(2-nitrophenyl)nitramine and N-methyl-N-(3-nitrophenyl)nitramine.
abstract: The structures of the two title isomeric compounds (systematic names: N-methyl-N,2-dinitroaniline and N-methyl-N,3-dinitroaniline, both C7H7N3O4) are slightly different because they exhibit different steric hindrances and hydrogen-bonding environments. The aromatic rings are planar. The -N(Me)NO2 and -NO2 groups are not coplanar with the rings. Comparison of the geometric parameters of the ortho, meta and para isomers together with those of N-methyl-N-phenylnitramine suggests that the position of the nitro group has a strong influence on the aromatic ring distortion. The crystal packing is stabilized by weak C-H...O hydrogen bonds to the nitramine group.
authors.affiliation: Institute of Chemistry, University of Opole, Oleska 48, 45-052 Opole, Poland.
authors.forename: Bartosz
authors.initials: B
authors.lastname: Zarychta
authors.forename: Anna
authors.initials: A
authors.lastname: Piecyk-Mizgała
authors.forename: Zdzisław
authors.initials: Z
authors.lastname: Daszkiewicz
authors.forename: Jacek
authors.initials: J
authors.lastname: Zaleski