Date Published: June 01, 2012
Publisher: International Union of Crystallography
Author(s): Lynn V. Koplitz, Joel T. Mague, Michael N. Kammer, Cameron A. McCormick, Heather E. Renfro, David J. Vumbaco.
In the title compound, C7H7N2+·NO3−, all atoms except the methyl H atoms lie on a crystallographic mirror plane. The interlayer distance, including that between aligned N atoms from alternating cations and anions in adjacent layers, is exceptionally short at 3.055 (1) Å. Two-dimensional C—H⋯O hydrogen-bonded networks link cations to anions, while C—H⋯N interactions link cations within each layer. Anion–π interactions with the cations assist in binding the layers together.
For the structure of 2-cyanoanilinium nitrate, see: Cui & Wen (2008 ▶). For the structures of other 2- and 3-cyanoanilinium salts, see: Zhang (2009 ▶); Wang (2009a ▶,b ▶); Wen (2008 ▶). For previous work on cyano-N-methylpyridinium salts, see: Koplitz et al. (2003 ▶); Mague et al. (2005 ▶). For a discussion of anion–π interactions, see: Frontera et al. (2011 ▶).