CYCLOHEXENE OXIDATION WITH AN IRON CYCLAM-TYPE COMPLEX ENCAPSULATED IN Y-ZEOLITE

The synthesis and characterization of an iron cyclam-type complex with in the cavities of a Y-zeolite is described. By comparing the performa nce of the heterogeneous system with the free complex in the oxidation of cyclohexene using iodosylbenzene as oxygen donor, a protection eff ect of the matrix over the active center was evidenced by a higher tur nover and yield of products. It was possible to determine, by UV-VIS s pectroscopy, that the free complex suffers molecular degradation after two hours of reaction whereas the heterogeneous catalyst remains unal tered and active after 24 hours of reaction. The main products found i n the catalyzed reaction were 2-cyclohexen-1-ol, 2-cyclohexen-1-one, e poxycyclohexane and cyclohexanol.