Kinetics and mechanism of the reactions of sulfito complexes in aqueous solution. 7. Formation and redox reactions of sulfur-bonded aqua(sulfito)- and bis(sulfito)[bis(phenanthroline) or- bis(bipyridine)]cobalt(III) complex ions

1986 ◽  
Vol 25 (13) ◽  
pp. 2229-2237 ◽  
Author(s):  
V. K. Joshi ◽  
R. Van Eldik ◽  
G. M. Harris
Keyword(s):  
Aqueous Solution ◽  
Redox Reactions ◽  
Kinetics And Mechanism ◽  
Complex Ions

Kinetics and mechanism of redox reactions of U(III) ions with monochloroacetic and dichloroacetic acids

1979 ◽  
Vol 44 (2) ◽  
pp. 401-405 ◽  
Author(s):  
Ľubica Adamčíková ◽  
Ľudovít Treindl
Keyword(s):  
Redox Reactions ◽  
Reaction Rate ◽  
Activation Parameters ◽  
Outer Sphere ◽  
Alcohol Concentration ◽  
Kinetics And Mechanism ◽  
Solvent Structure ◽  
Influence Of Ph ◽  
Sphere Mechanism

The kinetics and mechanism of the redox reactions of U3+ ions with mono- and dichloroacetic acids were studied. The influence of pH was observed mainly in the second case and led to the determination of the rate constants and activation parameters corresponding to two parallel steps, namely oxidation of U3+ with CHCl2COO- ions and oxidation of U3+ with CHCl2.COOH molecules. The influence of binary mixtures of water with methanol, ethanol, isopropanol, or tert-butenol on the reaction rate was followed. Increasing alcohol concentration influences the rate constant not only through changing dielectric constant and solvation of the reactants but also through a change of the solvent structure which plays a role in reactions with an outer sphere mechanism of the electron transfer.

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