Catalytic oxidation of olefins with hydrogen peroxide catalyzed by [Fe(III)(salen)Cl] complex covalently linked to polyoxometalate

The catalytic activity of a hybrid compound [Fe(salen)-POM] (1) consisting of Fe(III)(salen)Cl [H2salen = N,N  ′-bis(salicylidene)ethylenediamine] complex covalently linked to a Keggin type polyoxometalate, K8SiW11O39K8SiW11O39, (POM) was studied in the oxidation of various olefins in acetonitrile, using hydrogen peroxide as oxygen source. While, [Fe(salen)-POM] catalyst showed moderate to good catalytic activity and product selectivity in the oxidation reactions, the complex Fe(III)(salen)Cl showed poor catalytic activity in these reactions. The effect of other parameters such solvent, oxidant, temperature and the metal type in Schiff base complex were also investigated.

Graphical abstractThe catalytic activity of Fe(salen) covalently linked to a Keggin type polyoxometalate K8SiW11O39K8SiW11O39 (POM) was studied in the oxidation of various olefins in acetonitrile, using hydrogen peroxide as oxygen source. While, [Fe(salen)-POM] catalyst showed moderate to good catalytic activity and product selectivity in the oxidation reactions, the complex Fe(III)(salen)Cl remained catalytically inactive in these reactions.Figure optionsDownload full-size imageDownload as PowerPoint slide