Bis(2,4,6-triamino-1,3,5-triazin-1-ium) 2-[bis(carboxylatomethyl)azaniumyl]acetate trihydrate
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چکیده
The title compound, 2C3H7N6 (+)·C6H7NO6 (2-)·3H2O, was obtained by mixing melamine and nitrilo-tri-acetic acid in aqueous solution. There is proton transfer from the nitrilo-triacteic acid to melamine to produce two melaminium cations and an inter-nal proton transfer to generate the [HN(CH2COO)](2-) zwitterion. The melaminium cations are arranged in hydrogen-bonded tapes formed by N-H⋯N inter-actions. These tapes extend parallel to the [010] direction and are stacked parallel to the a axis at a mean separation of 3.3559 (11) Å. Between these tapes lie the anions and lattice water mol-ecules. Further O-H⋯O and N-H⋯O hydrogen bonds exist between the water mol-ecules, the anions, and the melaminium cations, generating a three-dimensional array. The crystal examined was found to be twinned by a twofold rotation about the direct lattice direction [100]. The two twin components were present in the ratio 0.5918:0.4082 (14).
منابع مشابه
2,4,6-Triamino-1,3,5-triazin-1-ium 3-(prop-2-enoyloxy)propanoate acrylic acid monosolvate monohydrate
The asymmetric unit of the title salt, C3H7N6 (+)·C6H7O4 (-)·C3H4O2·H2O, contains a 2,4,6-tri-amino-1,3,5-triazin-1-ium cation, a 3-(prop-2-eno-yloxy)propano-ate anion and acrylic acid and water solvent mol-ecules in a 1:1:1:1 ratio and with each species in a general position. In the crystal, the components are linked into a supra-molecular layer in the bc plane via a combination of O-H⋯O, N-H⋯...
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In the title hydrated mol-ecular salt, 2C(3)H(7)N(6) (+)·HPO(4) (2-)·3H(2)O, three of the O atoms of the hydrogen phosphate anion are disordered over two positions, with relative occupancies of 0.763 (1) and 0.237 (1). In the crystal, the components are linked by N-H⋯N, N-H⋯O and O-H⋯O hydrogen bonds.
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