Abstract
In the title hydrated salt, C8H11N2O+center dot NO3-H2O, the N-C bond distances [1.349 (2) and 1.413 (2) angstrom] along with the sum of the angles (359.88 degrees) around the acetamide N atom clearly indicate that the heteroatom has an sp(2) character. The ammonium group is involved in a total of three N-H center dot center dot center dot O hydrogen bonds, two of these are with a water molecule, which forms two O-H center dot center dot center dot O hydrogen bonds. All these hydrogen bonds link the ionic units and the water molecule into infinite planar layers parallel to (100). The remaining two N-H center dot center dot center dot O interactions in which the ammoniun group is involved link these layers into an infinite three-dimensional network.