Kinetics and mechanism of 2,2′-bipyridine-catalyzed chromium(VI) oxidation of propan-2-ol in the presence and absence of surfactants

Abstract

Under kinetic conditions, monomeric Cr(VI) has been found kinetically active in the absence of bipy while in the bipy-catalyzed path, Cr(VI)-bipy complex has been suggested as the active oxidant. The uncatalyzed path shows the second-order dependence on [H⁺] while the bipy-catalyzed path shows the first-order dependence on [H⁺]. Both the uncatalyzed and bipy-catalyzed paths show the first-order dependence on [propan-2-ol]_T and [Cr(VI)]_T. The bipy-catalyzed path is the first order in [bipy]_T. Cetylpyridiniumchloride inhibits the reactions while sodium dodecyl sulfate catalyzes the reactions in the presence and in the absence of bipy.

Keywords:

• Cr(VI)
• Oxidation
• Propan-2-ol
• 2,2′-Bipyridine
• Surfactant

Acknowledgements

The authors are thankful to Burdwan University and UGC, New Delhi, for providing financial help.