Attempts have been made to immobilize some molybdenum-containing complexes with low molecular weight organic ligands, including newly synthesized ones, on commercial ion-exchange resins. The catalytic activity of these complexes in the epoxidation reaction of cyclohexene with tert-butyl hydroperoxide was evaluated and compared to that of the molybdenyl acetylacetonate homogeneous catalyst as well as to some polymeric molybdenum-containing catalysts derived from ion-exchange resins and obtained previously.