Kinetics and Mechanism of the Oxidation of Propan-1-ol and Propan-2-ol by Permanganate in the Absence and Presence of Tween-20 in Perchloric Acid Medium |
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Authors: | Email author" target="_blank">Pratik?K?SenEmail author Purabi?R?Samaddar Kaushik?Das |
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Institution: | (1) Department of Chemistry, Jadavpur University, Kolkata, 700032, India |
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Abstract: | The kinetics of the oxidation of propan-1-ol and propan-2-ol by KMnO4 in HClO4 medium has been studied in absence and presence of Tween-20. In the absence of Tween-20 the reaction is of first order with
respect to each of permanganate and H+, but of complex order with respect to substrate. The active oxidant species HMnO4 reacts with the alkanol molecule to form an intermediate complex, which decomposes in the rate-determining step to form the
respective product and Mnv. In the presence of Tween-20, both the oxidant and the substrate are distributed between the aqueous phase and the micellar
pseudo-phase and then react. Different kinetic and thermodynamic parameters have been evaluated. Compensation between water
structure destruction and substrate–micelle interaction plays an important role in the presence of the surfactant. |
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Keywords: | |
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