O. Simonsen et Pn. Jorgensen, AMMONIUM SALT NITROACETAMIDE, Acta crystallographica. Section C, Crystal structure communications, 50, 1994, pp. 1148-1149
The title compound, NH4+.C2H3N2O3- (1), has a nearly planar anion with
an intramolecular hydrogen bond and delocalization of the negative ch
arge. All the H atoms in the ammonium ion are involved in hydrogen bon
ds.