Electron impact fragmentation of isomeric 2-diazo-2-cyanoacetamides and 4-cyano-5-hydroxy-l,2,3-triazoles

On the basis of electron impact mass spectra, high-resolution mass spectra and metastable ion spectra, the isomerization of the molecular ions of N-aryl-2-diazo-2-cyanoacetamides and 1-aryl-4-cyano-5-hydroxy-l,2,3-triazoles into each other or into the common structure has been demonstrated. Corresponding N-cyclohexyl derivatives are unable to undergo such a transformation.