5-Phenyl-3-(2-phosphono­eth­yl)-1,2,3-triazol-1-ium chloride Chachlaki, Elpiniki Choquesillo Lazarte, Duane Demadis, Konstantinos D. Phosphonate Triazole Hydrogen bonding Click Chemistry Crystal structure Crystallographic Information File (CIF) https://doi.org/10.1107/S2414314622001894/tx4001sup1.cif Contains datablock I Structure factor file (CIF format) https://doi.org/10.1107/S2414314622001894/tx4001Isup4.hkl Contains datablock I MDL mol file https://doi.org/10.1107/S2414314622001894/tx4001Isup5.mol Supplementary material Chemical Markup Language (CML) file https://doi.org/10.1107/S2414314622001894/tx4001Isup4.cml Supplementary material The new triazole-functionalized phospho­nic acid 5-phenyl-3-(2-phosphono­eth­yl)-1,2,3-triazol-1-ium chloride, C10H13N3O3P+·Cl− (PTEPHCl), was synthesized by the `click' reaction of the alkyl azide diethyl-(2-azido­eth­yl)phospho­nate with phenyl­acetyl­ene to give the dieth­yl[2-(4-phenyl-1H-1,2,3-triazol-1-yl)eth­yl]phospho­nate ester, which was then hydrolyzed under acidic conditions (HCl) to give the `free' phospho­nic acid. The use of HCl for the hydrolysis caused protonation of the triazole ring, rendering the compound cationic, charged-balanced by a Cl− anion. There are extensive hydrogen-bonding inter­actions in the structure of PTEPHCl, involving the phospho­nic acid (–PO3H2) group, the triazolium ring and the Cl− anion. 2022-07-20T10:46:40Z 2022-07-20T10:46:40Z 2022 journal article Chachlaki et al. 5-Phenyl-3-(2-phosphono­eth­yl)-1,2,3-triazol-1-ium chloride. IUCrData (2022). 7, x220189 [https://doi.org/10.1107/S2414314622001894] http://hdl.handle.net/10481/76314 10.1107/S2414314622001894 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional International Union of Crystallography