Abstract
It has been discovered with the aid of IR and NMR spectroscopy that 5-azidotetrazolo [1,5-a]quinazoline exists in solutions in a tautomeric equilibrium with ditetrazolo [1,5-a:1′,5′-c]quinazoline, and the thermodynamic and kinetic characteristics of the equilibrium have been determined. Azide-tetrazole tautomerism is not observed under these conditions for ditetrazolo[1,5-a:5′,1′-c]pyrazine, 6-azidotetrazolo [1,5-b]pyridazine, and their benzo analogs.
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