| abstract |
Disclosed is a boron-free organometallic composition comprising an extensively fluorinated organic, air-stable compound comprising a 5 or 6 carbon diunsaturated ring and an alkyl derivative of magnesium or, preferably, aluminum. This composition can be used as an activator of the metallocene complex of Group 4 of the Periodic Table of the Elements to obtain a catalyst for the polymerization of alpha-olefins with high activity and low metal content. |