13C–H coupling constants as a tool in tautomerism studies of 1,2,3-triazole, 1,2,4-triazole, and tetrazole
Abstract
Comparison of one or two bond 13C–H coupling constants of azoles and their N-methylated derivatives indicates that 1,2,3-triazole, like pyrazole, in concentrated solutions exists as a cyclic associate, whereas 4-methyl-1,2,3-triazole, 1,2,4-triazole, and tetrazole are linearly associated, like imidazole. Similar results were obtained using 13C–H couplings of azole–acetone adducts as reference. The results agree with other trends in physical properties.
Please wait while we load your content...
