Kinetic study of iridium(III) catalyzed oxidation of 2-phenyl ethanol and 2-methyl cyclohexanol by cerium(IV) sulphate
| Main Authors: | Praveen K. Tandon, Priy B. Dwivedi, Santosh B. Singh, Suresh C. Yadav |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 2013
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5794023 |
Daftar Isi:
- Department of Chemistry, University of Allahabad, Allahabad-211 002, Uttar. Pradesh, India E-mail : pktandon123@rediffmail.com Manuscript received online 15 December 2012, revised 30 January 2013, accepted 07 February 2013 Oxidation of 2-phenyl ethanol and 2-methyl cyclohexanol by cerium(IV) sulphate in aqueous sulphuric acid medium is greatly enhanced by iridium(III) chloride. Catalyst combines with the complex formed between cerium(Iv) and organic substrate and ultimately gives rise to corresponding aromatic dicarboxylic acids as the product of oxidation. Reactions follows direct proportionality with respect to catalyst concentrations while the first order kinetics shown by the oxidant and organic substrate at their low concentrations become zero order at higher concentrations of both oxidant and organic substrate. Rate decreased with increasing concentrations of H+ ions. Externally added CeIII and Cl- ions have negative effects on the reaction rate. Stoichiometry of the reaction was determined and the final oxidation products were identified to be 2-phenyl ethanoic acid and 2-methyl hexane-1,6-dioic acid respectively for 2-phenyl ethanol and 2- methyl cyclohexanol. Complex formation in 2-methyl cyclohexanol is easier compared to that in case of 2-phenyl ethanol.