Kinetics of the Oxidation of Cyclopentanone and Cyclooctanone by Cerium (IV)

Seema Singh¹, Bharti Jain² and Suman Mallik¹

¹Chemistry Department, Sadhu Vaswani College, Bairagarh, Bhopal (India)

²Department of Chemistry, Sarojini Naidu Govt. Girls P.G. College, Shivaji Nagar, Bhopal (India) 

 

DOI : http://dx.doi.org/10.13005/msri/031a17

ABSTRACT:

Kinetic investigations of oxidation of Cyclopentanone and Cyclooctanone by Cerium (IV) in H2SO4 medium in acetic acid -water (1:1) solution have been made in the temperature range 50 - 800 C iodometrically. The reaction is first order with respect to both Ce (IV) and the substrate. Corresponding 1, 2- diaketones are found to be oxidation product. H2SO4 shows negative acid catalyzed effect on reaction rate, while positive effect of ionic strength on rate constant is observed. Reaction rate increases with acetic acid concentration. Magnitude of Arrhenius parameters indicates the bimolecular nature of the reaction. Salt effect and low energy values support the formation of intermediate complex, decomposition of which is slow and rate determining step. A suitable mechanism is proposed.

KEYWORDS: Cyclopentanone; Cyclooctanone; Ionic strength; Intermediate complex

Copy the following to cite this article: Singh S, Jain B, Mallik S. Kinetics of the Oxidation of Cyclopentanone and Cyclooctanone by Cerium (IV). Mat.Sci.Res.India;3(1a)

Copy the following to cite this URL: Singh S, Jain B, Mallik S. Kinetics of the Oxidation of Cyclopentanone and Cyclooctanone by Cerium (IV). Mat.Sci.Res.India;3(1a). Available from: http://www.materialsciencejournal.org/?p=2179

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