One of pyridinecarboxaldehyde iron(III) Schiff base complexes of [Fe(PA₂OPd)Cl₂]Cl was synthesized and its catalytic activities for epoxidation of cyclohexene were studied. The complex of [Fe(PA₂OPd)Cl₂]Cl has the highest catalytic activity for cyclohexene epoxidation using hydrogen peroxide as an oxygen source. At optimum reaction condition (ethyl acetate as a solvent, 25 ℃, pH＝5.0, 6.0 h), the conversion rate of cyclohexene reached 90.5%, the selectivity of cyclohexene oxide was 97.2%, and the TON (moles of cyclohexene oxide produced per mole of [Fe(PA₂OPd)Cl₂]Cl ) was 1759.

Key words: cyclohexene, hydrogen peroxide, cyclohexene oxide, Schiff base, metal complex