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Type: Artigo de periódico
Title: The Kinetics And Mechanism Of The Reaction Of Zincon, O-[1-(2-hydroxy-5-sulfophenyl)-3-phenyl-5-formazane] Benzoic Acid, With Zn2+, Cu2+ And [zn2+ + Cu2+] Equimolar Mixtures
Author: Rossi A.V.
Tubino M.
Abstract: The kinetics and mechanism of the reactions between ZINCON and Zn2+, Cu2+ and Zn2++Cu2+ equimolar mixtures were studied. The reactions were performed in aqueous solution (pH = 9.0) and monitored spectrophotometrically at 610 nm. The rates of the reactions were determined using the stopped-flow technique. The mechanistic model proposed to explain these reactions assumes OH- and/or H2O bridges involving polymeric species of Zn2+ and Cu2+ in the aqueous solution. The reaction between the metal cations and ZINCON can be described as occurring in two general steps: i) an initial very fast reaction between the OH-/H2O bridges or solvation water molecules of the cations and the oxygen atoms of the ligand; and ii) the binding of the cations to the nitrogen of the ligand, forming the ZINCON-cation complex.
Rights: aberto
Identifier DOI: 
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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