| abstract |
Indenyl compound of formula (1)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 groupand Z and X are substituents, wherein R contains at least one sp2-hybridized carbon atom that is bonded to the indenyl group at the 2-position with the exclusion of Ti(deshydronorbiphenacene) dichloride. |