Overview of the 19972000 activity of Volcn de Colima, Mxico

The present invention relates to a stereorigid metallocene compound which has as ligands at least two substituted or unsubstituted cyclopentadienyl groups which are connected to one another via a five-membered ring, where at least one cyclopentadienyl group is fuzed to the five-membered ring and the ligand system of the stereorigid metallocene compound is different from 4-[( eta 5-3'-alkyl-cyclopentadienyl)-4,6,6-trimethyl-( eta 5-2-alkyl-4,5-tetrahydropentalene)]. The metallocene compound of the invention is suitable as a catalyst component for olefin polymerization.