Year 2005, Month 2 (Section Brief Communications, Page 462)
Kinetics of oxidation of alcohols with tetramethylammonium
f luorochromate
F. Gharib,* K. Zare, Sh. Ghammami,and R. Ebrahimi
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.
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