An array of 3-alkyl-1,2,3-triazol-1-ium hydrogen sulphate derivatives was obtained from the reaction between some 1,4-disubstituted-1,2,3-triazoles and H2SO4 through a simple protocol in good yields. The molecular structure of a triazolium salt (R1 = PhCH2, R2 = CH2O(4-CHO)C6H4) was unambiguously determined from X-ray diffraction studies, showing a remarkable triazole N3–H bond.
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