Investigation of the effect of organic solvents on kinetic parameters in metal catalyzed reactions

Abstract

The effects of acetone and acetonitrile on the kinetic parameters of azorubin S oxidation by hydrogen peroxide catalyzed by manganese(II), pyrocatechol violet oxidation by hydrogen peroxide catalyzed by copper(II), and carminic acid oxidation by hydrogen peroxide catalyzed by copper(II) and activated by bifenox, were examined. It was established that the examined solvents exhibit various effects on the kinetic parameters of the above said reactions. In a11 instances a change in the solvent concentration effects both the anthalpy and the entropy contributions to the free activation energy during the transition of the system into the active state, as well as the constant of the active complex formed at this point.

Keywords

• Kinetics
• metal catalyzed reactions
• acetone
• acetinitrile
• azorubin S
• pyrocatechol violet
• carminic acid
• hydrogen peroxide