INDENE SUBSTITUTED WITH A GROUP COMPRISING A HETERO ATOM

摘要

Substituted indene compound of which at least one substituent is of the form -RDR'n where R is a bonding group between the indene and the DR'n group, D is a hetero atom chosen from group 15 or 16 of the Periodic System of the Elements or an aryl group, R' is a substituent and n is the number of R' groups bonded to D. Metal complexes in which at least one of these indene compounds is present as a ligand are useful as catalysts for the polymerisation of alpha-olefins.