organic compounds
Open access
The melaminium (2,4,6-triamino-1,3,5-triazin-1-ium) cation in the title compound, C3H7N6+·C3H3O4−, is essentially planar, with a r.m.s. deviation of the non-H atoms of 0.0085 Å. Extensive hydrogen bonding of the types N—HN and N—HO between cations and cations and between cations and hydrogen malonate (2-carboxyethanoate) anions leads to the formation of supramolecular layers parallel to (1-2-1). An intramolecular O—HO hydrogen bond in the single deprotonated malonate anion also occurs.
organic compounds
Open access
The asymmetric unit of the solvated title salt, 2C3H7N6+·C4H4O42−·C4H6O4·2H2O, contains one essentially planar melaminium (2,4,6-triamino-1,3,5-triazin-1-ium) cation (r.m.s. deviation of the non-H atoms = 0.0097 Å), one-half of a succinate anion, one-half of a succinic acid solvent molecule and one water molecule of crystallization; full molecules are generated by inversion symmetry. Supramolecular layers parallel to (12-1) are formed through extensive intermolecular hydrogen bonding of the types O—HO, N—HN and N—HO between the components.