Self-immobilized and polymerized miscellaneous metallocene catalysts for ethylene polymerization

Metallocene complexes with an allyl group (η5-C3H5C5H4)(η5-tBuC5H4)ZrCl2 (2), (η5-C3H5C5H4)(η5-tBuC5H4)ZrCl2 (3) and (η5-C3H5C5H4)(η5-tBu2C5H3)ZrCl2 (4) have been synthesized and characterized. The polymerized metallocene catalyst 5 is prepared by the copolymerization of 3 with styrene in the presence of radical initiator. In the presence of MAO, 2–5 can be used as catalysts for ethylene polymerization with high activities.