| abstract |
A new class of bridged bis(tetrahydro-indenyl)metallocenes of formula (I), wherein M is Zr of Hf; X are monoanionic sigma ligands; (ZR1i)j is a divalent group bridging the two tetrahydro-indenyl residues; R?2 and R3¿ are halogen, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radicals; p is 0-3; i is 1 or 2; j is 1-4; m is 0-2; n is 0-8. Furthermore, catalysts systems for olefin polymerization containing them and the corresponding ligands are described. |