Novel tungsten catalysts grafted onto polymeric materials: a comparison with phase transfer catalysis

Summary The reaction of hydrogen peroxide with tungstic acid, “H 2 WO 4 ”, or H 3 [PW 12 O 40 ]aq and orthophosphoric acid has been studied, and the formation of novel oxoperoxotungstophosphate species, [PwxOy] ω- has been demonstrated. Some of them have been isolated and can be grafted onto polymeric supports. They are active oxygen-to-olefin transfer agents, in association with H 2 O 2 ; these novel catalysts are compared with phase transfer systems.