oxidation of alkenes with tert-butyl hydroperoxide catalyzed by mn(ii), cu(ii) and vo(iv) schiff base complexes encapsulated in the zeolite-y: a comparative study

Oxovanadium(iv), manganese(ii) and copper(ii) complexes of a schiff base ligand derived from 2,4-dihydroxyacetophenone and 1,2-diaminocyclohexane have been encapsulated in the nanocavity of zeolite-y by flexible ligand method and characterized by metal analysis, ir spectroscopic studies and x-ray diffraction patterns. the encapsulated complexes abbreviated here as cul-y, mnl-y and vol-y catalyze the oxidation of various olefins using tert-butyl hydroperoxide (tbhp) as oxidant in good yield (α-methyl styrene: 75%). the catalytic activity of the encapsulated schiff base complexes decreased in the order cul-y > vol-y > mnl-y.