Tetrazole compounds. 11. electron impact mass spectrometry of 1-aryl-5-(l-acyl-2-dialkylaminovinyl)-1H-tetrazoles

The mass spectrometric behaviour of 1-aryl-5-(1-acyl-2-dialkylaminovinyl)-1H-tetrazoles was studied, especially using 1-phenyl-5-(1-benzoyl-2-dimethylaminovinyl)-1H-tetrazole 1 and its D-and ¹⁵N-labeled derivatives. All tetrazoles investigated showed a clearly observable molecular ion and underwent as the main fragmentation the elimination of nitrogen followed by a number of various subsequent processes. Besides, primary fragments such as [M ? N₃^?]⁺ and [M — ArN₃]^+? were also observed.