Abstract: A process for the preparation of an olefin homopolymer or copolymer comprising polymerising at least one C2-20-?-olefin in slurry phase in the presence of 1) a metallocene compound of formula I: (Cp) (Cp?) RnMX2 (I) wherein: Cp is an optionally substituted and/or optionally fused homo- or heterocyclopentadienyl ligand; Cp? is a cyclopentadienyl substituted by at least one C1-20-alkyl group; R is a bridge of 1-7 bridging atoms; M is a group 4 to 6 transition metal; each X is —CH2—Y, wherein Y is C6-20-aryl, C6-20 heteroaryl, C1-20-alkoxy, C6-20-aryloxy, —NR?2, —SR?, —PR?3, —SiR?3, —OSiR?3 or halogen; R?is C1-20-hydrocarbyl or in case of —NR?2, the two substituents R? can form a ring together with the nitrogen atom wherein they are attached to; and each non-cyclopentadienyl ring moiety can further be substituted; n is 0 or 1; and (11) an aluminoxane.

Abstract: The invention describes ligands of formula (I), wherein LIG represents an &eegr;5-ligand substituted by a group R1 and a group (R″)m; X represents a 1 to 3 atom bridge; Y represents a nitrogen or phosphorus atom; Z represents a carbon, nitrogen or phosphorus atom.

Abstract: The invention describes ligands of formula (I), wherein LIG represents an &eegr;5-ligand substituted by a group R1 and a group (R″)m; X represents a 1 to 3 atom bridge; Y represents a nitrogen or phosphorus atom; Z represents a carbon, nitrogen or phosphorus atom.