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

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Abstract
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.