Vol. 11, Issue 3 (2023)
To find out the methodology of oxidation of substituted piperidones by Mn (IV) in sulphuric acid medium
Author(s): Dr. Manish Rao Ambedkar, Dr. Kavindra Kumar and Dr. Renu Kumari
Abstract: Transition metal ions are widely used as oxidants both in synthetic organic chemistry and analytical chemistry. In the present work we have undertaken the kinetic and mechanistic studies of the oxidation of 2,6-Diphenyl piperidine-4-one and 3-methyl-2,6-Diphenyl piperidine-4-one by Manganese (IV) in sulphuric acid media.The kinetic studies with Mn (IV) have been carried out in aqueous sulphuric acid in the range of 0.3 to 0.5 M, in the temperature range of 25 to 55 °C. The reaction show variations in acidity dependence. The acid permanganate seems to be the active species in the case of Mn (VII) oxidations whereas in the case of Mn (III) the aquo species seems to be the active species. As for Mn (IV), Mn (OH)3+ has been proposed as the active species. Further in all these cases it has been assumed that the monomeric form of Mn (IV) or Mn (III) predominantes in the oxidation process and all the rate equations have been derived on the basis of this concept. Kinetic studies have been carried out spectrophotometrically using Unicam SP 700 oran SP 500 spectrophotometer (Series 2) at 520, 380 and 420nm. Electrolysis was carried out at a current density of 12 mA/cm2 at 0 °C.The rate of oxidation for the substituted piperidones follow the order 2,6-diphenylpiperidine-4- one > 3-methyl-2,6-diphenylpiperidine-4- one, and the oxidizing capacity of oxidants in the expected order of Mn (IV) > Mn (III) > Mn (VII).
Pages: 27-36 | 527 Views 167 Downloads
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How to cite this article:
Dr. Manish Rao Ambedkar, Dr. Kavindra Kumar, Dr. Renu Kumari. To find out the methodology of oxidation of substituted piperidones by Mn (IV) in sulphuric acid medium. Int J Chem Stud 2023;11(3):27-36.
