Synthesis and Spectroscopic Study of New 1H-1-Alkyl-6-methyl-7-nitroso-3-phenylpyrazolo5,1-c1,2,4triazoles

The nitrosation of 1H-1-alkyl-6-methyl-3-phenylpyrazolo5,1-c1,2,4triazoles leads to new 1H-1-alkyl-6-methyl-7-nitroso-3-phenylpyrazolo5,1-c1,2,4 triazoles that react in acidic media, giving rise to 1H-1-alkyl-7-hydroxyimino-6-methyl-3-phenylpyrazolo5,1-c1,2,4triazolium salts. These compounds were characterized by FT-IR, UV-Vis, 1H-NMR, 13C-NMR, and 15N-NMR spectroscopic techniques.