Bis(2,4,6-triamino-1,3,5-triazin-1-ium) pyrazine-2,3-dicarboxylate tetrahydrate: a synchrotron radiation study

Acta Crystallographica Section E

Structure Reports Online

Volume 66, Part 6 (June 2010)

organic compounds

sj2786 scheme

Acta Cryst. (2010). E66, o1368-o1369 [ doi:10.1107/S1600536810017290 ]

Bis(2,4,6-triamino-1,3,5-triazin-1-ium) pyrazine-2,3-dicarboxylate tetrahydrate: a synchrotron radiation study

H. Eshtiagh-Hosseini, A. Hassanpoor, L. Canadillas-Delgado and M. Mirzaei

Abstract: The title compound, 2C₃H₇N₆⁺·C₆H₂N₂O₄^2-·4H₂O or (tataH)₂(pzdc)·4H₂O, was synthesised by a reaction between pyrazine-2,3-dicarboxylic acid (H₂pzdc) as a proton donor and 2,4,6-triamino-1,3,5-triazin (tata) as a proton acceptor. In the crystal structure, an extensive series of O-HO, O-HN, N-HO and N-HN hydrogen bonds generates a three-dimensional framework with the hydrogen bonding involving most donor and acceptor centers. [pi] - [pi] stacking interactions are also observed between adjacent triazine rings, with centroid-centroid distances of 3.4994 (8) and 3.5922 (7) Å.