EPOXIDATION OF CIS-CYCLOOCTENE WITH MOLECULAR-OXYGEN CATALYZED BY MAGNESIUM-OXIDE SUPPORTED POLYTITAZANE COBALT(III) COMPLEXES

Magnesium oxide supported polytitazane cobalt(III) complex is demonstr ated as an effective catalyst for the epoxidation of cis-cyclooctene w ith molecular oxygen at atmospheric pressure in the presence of isobut yraldehyde as the sacrificial reductant. XPS data show that the high-v alent cobalt(III) is stabilized by the multidentate nitrogen ligand of polytitazane. The conversion of cis-cyclooctene is as high as 95.2% w ith 100% selectivity to the cis-cyclooctene oxide at 25 degrees C with in 5 h. The catalyst can be used at least nine times without loss of i ts activity.