Patent ID: 6627764
Filing Date: 2003-09-30
Classification: C07F,C08F,Y10S

Abstract:
A compound of the formula (II) whereM is Ti, Zr or Hf, R3 is a C1-C20-group, R5 is a hydrogen atom, R4, R6 are identical or different and are each a hydrogen atom or a C1-C20-group, R20 R21 are identical or different and are each a halogen atom or a C1-C20-group, and two radicals R20 or R21 may form a monocyclic or polycyclic ring system which may in turn be substituted or unsubstituted, X is a halogen atom, Q is a C4-C24-aryl ring system which may in turn bear a group R20 as substituent or a heteroaryl which together with the cyclopentadienyl ring forms an azapentalene, thiopentalene or phosphapentalene which may in turn bear a group R20 as substituent, l,lâ€² are identical or different and are each 1 or 2, B is a bridging structural element between the two cyclopentadienyl moieties.