Abstract
Abstract A new form of polymeric compound of molybdenum, [MoO(O2)2.4,4′-bipy]n, was synthesized by a simple and inexpensive route and characterized by infrared, ultraviolet, nuclear magnetic resonance spectroscopes and thermal analysis. The prepared catalyst was used for the epoxidation of cyclohexene and cyclooctene in a heterogeneous system at room temperature. Results showed that the new form of MoO5 complex has significant potential as an oxidant in oxygen atom transfer reactions. This reagent oxidized olefins to epoxides in the presence of hydrogen peroxide with high conversions and selectivity. Effects of temperature, amount of catalyst, hydrogen peroxide and solvent in the epoxidation of substrate have been investigated. The stability of catalyst in epoxidation reactions has been investigated in homogenous system by recovering catalyst and recycling. Results showed that catalyst can be used at least for five consecutive cycles without a significant drop in yield.
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