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Oxidation of triphenylphosphine by dioxygen in the presence of iron(III) perchlorate

I. Ondrejkovičová, V. Vančová, and G. Ondrejovič

Department of Inorganic Chemistry, Faculty of ChemicalTechnology, Slovak Technical University, CS-81237 Bratislava

 

Abstract: In the presence of iron(III) perchlorate triphenylphosphine is oxidized by dioxygen under mild conditions in acetonitrile solution to yield triphenylphosphine oxide. At the same time, Fe(III) is reduced to Fe(II) and a ferrous complex of composition Fe(OPPh3)4(ClO4)2 comes into existence. Perchloric acid is formed as a side product. The reaction exhibits stoichiometric course and the oxidation of triphenylphosphine proceeds as far as the mole ratio n(PPh3):n(Fe) = 4 is reached. The cause why the generated Fe(II) complex does not act as a catalyst of the oxidation of triphenylphosphine is discussed in this paper.

Full paper in Portable Document Format: 451a35.pdf

 

Chemical Papers 45 (1) 35–40 (1991)

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