| 摘要 |
Precursor for a catalyst, comprising a transition metal or lanthanide with a ligand system in which at least one Cp derivative is present and in which the precursor contains a non-coordinating anion A<->, which can stabilize a catalyst obtained by the activation of the precursor and which is bound to a cationic group of the Cp derivative or is bound to a cationic group forming part of or being bound to a bridge bound to the Cp derivative within the precursor, the cationic group containing a subgroup which is capable of reacting with a metal-bound alkyl, benzyl or phenyl group and a process for the polymerization of olefins in the presence of a catalyst prepared by contacting such a precursor with an alkylating compound. |
