Freezing of equilibrium of 1,2,3-triazole and 3(5)-methylpyrazole by complex formation with 1,1-bis(2,4-dimethylphenyl)but-2-yn-1-ol, and X-ray crystal structure of the complexes
From an equilibrium mixture of two tautomers, 1H- and 2H-1,2,3-triazole, the relatively unstable 1H-isomer was isolated in pure state as a 1:1 complex with 1, 1-bis(2,4-dimethylphenyl)but-2-yn-1-ol. The two equilibrating tautomers of almost the same stability, 3- and 5-methyltriazole, were also isolated in pure state as a 1:1:1 complex of these and the host compound.