The synthesis and spectral properties determination of 1,3-substituted phenyl-5-phenylformazans

In this study, novel 1,3-substituted phenyl-5-phenylformazans were synthesized with –NO2, –Cl, –Br, –CH3, –OCH3 groups in the o-, m-, and p-position of the 1-phenyl ring and –NO2, –OCH3 groups in the m- and p-position of the 3-phenyl ring. Their structures were elucidated by elemental analysis and GC–mass and their spectral behaviors were investigated with 1H NMR, 13C NMR, IR, UV–vis spectra. The absorption characteristics of the compounds were examined by UV–vis spectra. There was a shift in λmax whose amount was dependent upon the type and position of the substituent on the ring. A linear correlation was obtained between this substituent effect and Hammett substituent coefficients.