The acid dissociation constants of some triphenylformazans are investigated spectrophotometrically. The absorption spectra are recorded in solutions of varying pH-values, the spectra indicate the existence of two equilibria in solutions for (Ia-Id) and one equilibrium for (Ie and If). The effect investigated and the results are correlated to solvent effect.
ZAKARIA FAHIM HANNA ,AIDA LOTFY ELANSARY ,YOUSRY MOUSTAFA ISSA ,
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