Patent ID: 6369254
Filing Date: 2002-04-09
Classification: C07F,C08F,Y10S

Abstract:
A metallocene compound of formula (I): whereinR1 is a (CH2)2 group; R2 and R3, which may be identical or different, are hydrogen atoms, C1-C20 alkyl radicals, C3-C20 cycloalkyl radicals, C2-C20 alkenyl radicals, C6-C20 aryl radicals, C7-C20 alkaryl radicals, or C7-C20 aralkyl radicals and can contain atoms of Si or Ge, and in addition two substituents R2 and R3 adjacent on the same indenyl can form a ring containing from 4 to 8 carbon atoms; M is an atom of a transition metal selected from the group consisting of groups 3, 4, 5 or 6 or the lanthanides or the actinides in the Periodic able of the Elements (new IUPAC version); and the substituents X which may be identical or different, are hydrogen atoms, halogen atoms, R OR, SR1, NR2, or PR2 groups, wherein the substituents R are C1-C20 alkyl radicals, C3-C20 cycloalkyl radicals, C2-C20 alkenyl radicals, C6-C20 aryl radicals, C7-C20 alkaryl radicals, or C7-C20 aralkyl radicals and can contain atoms of Si or Ge, wherein the substituents R2 in the 5 and 6 positions and the substituents R3 in the 1 positions are hydrogen atoms, and the substituents R2 in the 7 positions are different from hydrogen.