Kinetics and Equilibria for Complex Formation between Palladium(II) and Chloroacetate |
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Authors: | P?emysl Lubal Lars I Elding |
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Institution: | (1) Department of Analytical Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic;(2) Inorganic Chemistry, Department of Chemistry, Chemical Center, Lund University, P. O. Box 124, SE-221 00 Lund, Sweden |
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Abstract: | Kinetics and equilibria for the formation of a 1:1 complex between palladium(II) and chloroacetate were studied by spectrophotometric measurements in 1.00 mol HClO4 at 298.2 K. The equilibrium constant, K, of the reaction
was determined from multi-wavelength absorbance measurements of equilibrated solutions at variable temperatures as log 0.006 with and , and spectra of individual species were calculated. Variable-temperature kinetic measurements gave rate constants for the forward and backward reactions at 298.2 K and ionic strength 1.00 mol as and , with activation parameters and , respectively. From the kinetics of the forward and reverse processes, and were derived in good agreement with the results of the equilibrium measurements. Specific Ion Interaction Theory was employed for determination of thermodynamic equilibrium constants for the protonation of chloroacetate () and formation of the PdL+ complex (). Specific ion interaction coefficients were derived. |
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Keywords: | :" target="_blank">: Palladium(II) chloroacetic acid equilibrium kinetics thermodynamic and activation parameters LFER |
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