Process for the polymerization of olefins

摘要

An organometallic compound obtainable by contacting a) a compound having the following formula (I): wherein R, R, Rand Requal to or different from each other are hydrocarbon groups b) a Lewis acid of formula (II) MtR<1>3 (II) wherein Mt is a metal belonging to Group 13 of the Periodic Table of the Elements (IUPAC); R<1>, equal to or different from each other, are selected from the group consisting of halogen, halogenated C6-C20 aryl and halogenated C7-C20 alkylaryl groups; two R<1 >groups can also form with the metal Mt one condensed ring. These compounds are useful as cocatalysts for polymerizing olefins.