Acta Cryst. (2003). E59, o14-o17  [ doi:10.1107/S1600536802021670 ]

Hydrogen-bonded supramolecular motifs in trimethoprim-terephthalate-terephthalic acid (2/1/1)

M. Hemamalini, P. T. Muthiah, G. Bocelli and A. Cantoni

Abstract: In the title compound [2,4-diamino-5-(3,4,5-trimethoxybenzyl)pyrimidin-1-ium terephthalate terephthalic acid], 2C₁₄H₁₉N₄O₃⁺·C₈H₄O₄^2-·C₈H₆O₄, the trimethoprim molecule is protonated at one of the pyrimidine N atoms. The terephthalate anion and terephthalic acid molecule are centrosymmetric. The carboxylate groups of the terephthalate anion form double hydrogen bonds of type N-HO, resulting in a fork-like interaction with the protonated diaminopyrimidine rings.

Online 7 December 2002

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