Kinetics of oxidation of alcohols with tetramethylammonium fluorochromate |
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| Authors: | F Gharib K Zare Sh Ghammami R Ebrahimi |
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| Institution: | (1) Department of Chemistry, Shahid Beheshti University, Tehran, Evin, Iran;(2) Department of Chemistry, Islamic Azad University, Science and Research Branch, Tehran, Hesarak, Iran;(3) Department of Chemistry, Imam Khomeini International University, Qazvin, Iran |
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| Abstract: | The oxidation of isopropyl, benzyl, and n-butyl alcohols to the corresponding aldehydes with tetramethylammonium fluorochromate was studied by spectrophotometry in acetonitrile solutions in the presence of p-toluenesulfonic acid. The reaction kinetics was studied under pseudo-first-order conditions with respect to the oxidizing agent. The Michaelis-Menten kinetics with respect to the substrate was observed, indicating the quasi-equilibrium formation of an oxidizing agent-alcohol complex. The formation constants and the rates of disproportionation of the complexes were determined. The temperature dependences of the reaction rates were studied, and the activation parameters were computed. A reaction scheme consistent with the observed results was proposed.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 453–457, February, 2005. |
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| Keywords: | oxidation alcohols tetramethylammonium fluorochromate p-toluenesulfonic acid kinetics mechanism |
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