ALLYL-METALLOCENE COMPLEXES AND THEIR USE IN THE CATALYSIS OF (CO)POLYMERIZATION PROCESSES OF ALPHA-OLEFINS

摘要

Allyl polyalkylcyclopentadienyl complex of a metal of group 4 of the periodi c table, and its use in the preparation of a catalytic composition for the (co)polymerization of .alpha.-olefins. said complex is advantageously stable in solution and rapidly forms catalytic compositions with a high activity without the necessity of effecting alkylating pretreatment.