4-Methoxyanilinium nitrate

The title compound, C7H10NO+·NO3 −, crystallized with two p-ansidinium cations and two nitrate anions in the asymmetric unit. As well as Columbic and van der Waals forces, moleucles interact via multiple bifurcated N—H⋯O hydrogen bonds that help consolidate the crystal packing, resulting in a three-dimensional network.

The title compound, C 7 H 10 NO + ÁNO 3 À , crystallized with two pansidinium cations and two nitrate anions in the asymmetric unit. As well as Columbic and van der Waals forces, moleucles interact via multiple bifurcated N-HÁ Á ÁO hydrogen bonds that help consolidate the crystal packing, resulting in a threedimensional network.

Comment
Anisidine is used in various areas such as the production of polymers of high solubility which are interesting materials in electroconductivity and thermostability (Li et al., 2001). Nitrates also have many applications such as explosives and pyrotechnics and they can be powerful oxidizers (Kapoor et al., 2008). Association of both entities could lead to novel hybrid compounds with interesting physical and chemical properties (Wilkes et al., 1985). The exploitation of these materials requires knowledge of not only their electronic properties but also of their atomic arrangements.
In this paper, we report crystal structure of the interaction product of [p-ANI] and nitric acid (I). As shown in Fig.1, the asymmetric unit of (I) contains two nitrate anions and two [p-ANIH] + cations interconnected by N-H···O and C-H···O hydrogen bonds (Table 1)

Experimental
An ethanolic solution of p-anisidine [p-ANI] (10 mmol, in 10 ml) was added drop wise to a magnetically stirred aqueous solution of nitric acid HNO 3 (10 mmol, 20 ml). The resultant solution was then slowly evaporated at room temperature (295 K). After a few days, colorless crystals ofn(I) appeared that were suitable for X-ray diffraction measurements.

Special details
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.