The proton magnetic resonance spectra of various charged species from thirty-three azoles have been measured. In N-methyl-imidazoles and -1,2,4-triazoles the sites of protonation have been determined, and the cations appear to be stabilised by amidinium type resonance. Solvent effects are discussed.
G. B. Barlin and T. J. Batterham, J. Chem. Soc. B, 1967, 516 DOI: 10.1039/J29670000516
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