Date Published: August 01, 2009
Publisher: International Union of Crystallography
Author(s): V. H. Rodrigues, M. M. R. R. Costa, T. Dekola, E. de Matos Gomes.
All the residues of the title compound, (C5H6N3O2)[ReO4]·H2O, are located on general crystallographic positions. The 2-amino-5-nitropyridinium cation has a typical planar conformation with one of the nitro O atoms −0.058 (5) Å out of plane; the amine H atoms are also a little out of the main ring plane towards the opposite side of the aforementioned O atom [by 0.02 (4) and 0.04 (4) Å]. The perrhenate anion is nearly ideally tetrahedral. Three distinct N—H⋯O hydrogen bonds give rise to C(8) zigzag chains running along . R44(12) rings involving the two hydrogen bonds in which the water molecules interact with the perrhenate anions are also present.
For the structural analyses of related 2-amino-5-nitropyridium salts and their potential application as non-linear optical materials, see: Masse & Zyss (1991 ▶); Puig-Molina et al. (1998 ▶); Aakeröy et al. (1998 ▶); Pecaut et al. (1993 ▶).