Process for the polymerisation of olefins in the presence of indenyl compounds

摘要

Indenyl compound of formula (1) <CHEM> wherein: M is a transition metal from the lanthanides or from group 3, 4, 5 or 6 of the Periodic System of Elements, Q is an anionic ligand to M, k is the number of Q groups, R is a bridging group and Z and X are substituents, wherein R contains at least one sp2-hybridised carbon atom that is bonded to the indenyl group at the 2-position with the exclusion of Ti(deshydronorbiphenacene> dichloride.