2016
DOI: 10.20290/btdb.01190
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Synthesis, Characterization and Spectroscopic Studies on Azo-Hydrazone Tautomerism and Acidity Constants of Certain 4-(Phenyldiazenyl) Benzene-1,3-Diol Derivatives

Abstract: In this study, monoazo dyes were synthesized through the diazotization of several substituted aminobenzenes and couplings with benzene-1,3-diols. The chemical structures of these compounds were characterized using spectroscopic techniques. The tautomeric properties of the 4-(phenyldiazenyl)benzene-1,3-diol derivative compounds were examined using UV-Vis. spectrophotometry in pure polar or apolar media (dimethyl sulfoxide, ethanol, chloroform, benzene and cyclohexane) under acidic and basic conditions at 25±1 °… Show more

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“…pKa values carry critical information about the complexes that ligands to be used in heavy metal removal will form with metal ions and their adsorption properties (56). While potentiometric (57) and spectrophotometric (58,59) titrations are widely used in determining pKa values of compounds, voltammetric (60), chromatographic (61,62), and nuclear magnetic resonance (NMR) spectroscopy (63) methods are also known to be used.…”
Section: Introductionmentioning
confidence: 99%
“…pKa values carry critical information about the complexes that ligands to be used in heavy metal removal will form with metal ions and their adsorption properties (56). While potentiometric (57) and spectrophotometric (58,59) titrations are widely used in determining pKa values of compounds, voltammetric (60), chromatographic (61,62), and nuclear magnetic resonance (NMR) spectroscopy (63) methods are also known to be used.…”
Section: Introductionmentioning
confidence: 99%