| 摘要 |
Catalyst systems having a high polymerization activity comprise at least one catalyst component of the formula (I):<paragraph lvl="0"><in-line-formula>RnMXm (I),</in-line-formula>where M1=Ti, Zr or Hf, Ra=C5 (R1, R2, R3, R4, R5) or C6 (R1, R2, R3, R4, R5, R6), where R1, R2, R3, R4, R5 and R6 are identical or different and are each a hydrogen atom, a C1-C20-alkyl group, a C1-C10-alkoxy group, a C1-C10-fluoroalkyl group, a C6-C20-aryl group, a C6-C10-aryloxy group, a C2-C10-alkenyl group, a C6-C10-fluoroaryl group, a C7-C40-arylalkyl group, a C7-C40-alkylaryl group, a C8-C40-arylalkenyl group, a silyl group or a germyl group or adjacent radicals R1, R2, R3, R4, R5 and R6 together with the atoms connecting them form a ring system, Rb=a fluorine atom when m=1, at least one fluorine atom when m>1 and can be identical or different and be at least one hydrogen atom, a C1-C20-alkyl group, a C1-C10-alkoxy group, a C1-C10-fluoroalkyl group, a C6-C20-aryl group, a C6-C10-aryloxy group, a C2-C10-alkenyl group, a C6-C10</
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