Abstract
Kinetic investigation of Ru(III) catalyzed oxidation of menthol in an acidified solution of potassium bromate in the presence of Hg(OAc)2 as a scavenger of bromine intermediate has been studied. The reaction exhibits zero order kinetics with respect to KBrO3. While first order kinetics with respect to menthol and Ru(III) respectively. Hydrogen ion does not affect the rate but rate is enhanced by ionic strength. The influence of Hg(OAc)2 on the rate was found to be insignificant. Menthone as the oxidation product of menthol has been confirmed spectrally. The proposed mechanism involves slow and rate-controlling disproportionate of a transient complex formed between reactive species of Ru(III) and menthol. The various activation parameter such as energy of activation (∆E)#, Arrhenius factor (A), and entropy of activation (∆S)# were calculated. The rate law derived on the basis of experimental data corresponds well with the proposed mechanism.
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ACKNOWLEDGMENTS
Acknowledgment is extended to the co-authors and Head of the Department of Chemistry, University of Rajasthan Jaipur (Rajasthan India). Authors would like to dedicate this work to Prof. (Late) P. D. Sharma, Department of Chemistry, University of Rajasthan, Jaipur, India.
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Jain, P., Rolaniya, A. & Sailani, R. Ru(III) Catalyzed Oxidation of Menthol by Bromate in Presence of Mercuric Acetate in Aqueous Acidic Medium: A Kinetic and Mechanistic Pathway. Russ. J. Phys. Chem. 96, 2381–2386 (2022). https://doi.org/10.1134/S0036024422110255
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DOI: https://doi.org/10.1134/S0036024422110255