2-Amino-4-methyl­pyrimidinium dihydrogen phosphate

A charge-assisted hydrogen-bonding network involving N—H...O and O—H...O hydrogen bonds stabilizes the crystal of the title salt, C₅H₈N₃⁺·H₂PO₄⁻. The dihydrogen phosphate anions form one-dimensional chains along [100], via O—H...O hydrogen bonds. The 2-amino-4-methyl­pyrimidinium cations are linked to these chains by means of two different kinds of N—H...O hydrogen bonds. Neighbouring chains are linked via C—H...N and C—H...O hydrogen bonds forming two-dimensional slab-like networks lying parallel to (01-1).

N,N′-(Propane-1,3-di­yl)bis­(2-amino­benzamide)

The title compound, C₁₇H₂₀N₄O₂, was prepared by the reaction between 1,3-di­amino­propane and isatoic anhydride in water. The carbonyl O atoms are involved in intra­molecular hydrogen bonding with the amine group and inter­molecular hydrogen bonding with an amide H atom of an adjacent mol­ecule. In the crystal, pairs of N—H...O hydrogen bonds link mol­ecules into inversion dimers and further N—H...O hydrogen bonds link the dimers into ladder-like chains along the a axis.