Acta Cryst. (2004). E60, o462-o463  [ doi:10.1107/S1600536804003514 ]

Bis(melaminium) terephthalate dihydrate

J. Zhang, Y. Kang, Y.-H. Wen, Z.-J. Li, Y.-Y. Qin and Y.-G. Yao

Abstract: The crystal structure of the title melaminium salt, bis(2,4,6-triamino-1,3,5-triazin-1-ium) terephthalate dihydrate, 2C₃H₇N₆⁺·C₈H₄O₄^2-·2H₂O, is composed of monoprotonated melaminium cations, terephthalate dianions and water molecules. The protonated melaminium cation and the terephthalate anion are almost coplanar, the latter possessing a twofold axis of symmetry. The crystal structure involves extensive N-HN, N-HO and O-HO hydrogen bonding.

Online 28 February 2004

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