4-Acetamido­anilinium nitrate monohydrate

In the title hydrated salt, C₈H₁₁N₂O⁺·NO₃⁻·H₂O, the N—C bond distances [1.349 (2) and 1.413 (2) Å] along with the sum of the angles (359.88°) around the acetamide N atom clearly indicate that the heteroatom has an sp² character. The ammonium group is involved in a total of three N—H...O hydrogen bonds, two of these are with a water mol­ecule, which forms two O—H...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...O inter­actions in which the ammoniun group is involved link these layers into an infinite three-dimensional network.

1-(2-Ammonio­eth­yl)piperazin-1,4-diium dihydrogeno­phosphate monohydrogeno­phosphate

The structure of the title compound, C₆H₁₈N₃·HPO₄·H₂PO₄, is characterized by two kinds of inorganic chains running along the a-axis direction. The first one is composed of HPO₄²⁻ anions, while the second one is built up by H₂PO₄⁻ anions. Both types of chains are held together by O—H...O hydrogen bonds. The organic cations are attached to these chains through N—H...O and C—H...O hydrogen bonds. The piperazin-1,4-diium ring adopts a chair conformation.