5-Amino-1H-1,2,4-triazol-4-ium-3-carboxyl­ate hemihydrate


The asymmetric unit of the title compound, C(3)H(4)N(4)O(2)·0.5H(2)O, comprises two whole mol-ecules of 5-amino-1H-1,2,4-triazole-3-carb-oxy-lic acid in its zwitterionic form (proton transfer occurs from the carb-oxy-lic acid group to the N hetero-atom at position 1), plus one water mol-ecule of crystallization. The organic moieties are disposed into supra… (More)
DOI: 10.1107/S160053681102811X

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@inproceedings{Fernandes20115Amino1H124triazol4ium3carboxyla, title={5-Amino-1H-1,2,4-triazol-4-ium-3-carboxyl­ate hemihydrate}, author={Jose A. Fernandes and Bing Liu and Jo{\~a}o P C Tom{\'e} and Lu{\'i}s Cunha-Silva and Filipe A. Almeida Paz}, booktitle={Acta crystallographica. Section E, Structure reports online}, year={2011} }