Resumen

Catalyst component for the polymerization of alpha-olefins of general formula (I) wherein:M is a transition metal of groups 3, 4-10 of the periodic table of the elements, Each X group can be equal or different and it is hydride, halogen, alkyl, cycloalkyl, aryl, alkenyl, arylalkyl, arylalkenyl or alkylaryl with 1 to 20 carbon atoms, linear or branched. L is a neutral Lewis baseA is a ring with delocalized π electrons, that directly coordinates to the transition metal M. Each E group can be equal to or different from each other and it is BR^III, CR^IV₂, SiR^III₂, GeR^III₂; at least one E is SiR^III₂. R^II is hydrogen, alkyl, cycloalkyl, aryl, alkenyl, arylalkyl, arylalkenyl or alkylaryl from I to 20 carbon atoms, linear or branched, whose hydrogens can be substituted by SiR₃, GeR₃, OR , NR₂, OSiR₃ or any combination of thereof. It can moreover form a condensed ring through another bond with E.