A study of Br/NO2 substitution reactions and nuclear magnetic resonance of 2,2-diaryl-1-picrylhydrazines

A series of compounds of type 2-Ma-2-Mb-1-pierylhydrazine with Ma, Mb = phenyl, p-bromophenyl, and p-nitrophenyl has been investigated. Conversion of p-bromophenyl into p-nitrophenyl caused by reaction with NO2 has been observed in compounds of the above series. Parameters of the 1H and 13C nmr spectra for the members of the series are reported. The new compound 2-(p-bromophenyl)-2-(p-nitrophenyl)-1-pierylhydrazine has been prepared and characterized using mass spectrometry, nuclear magnetic resonance, electron paramagnetic resonance, thin-layer chromatography, and elemental analysis.