| 摘要 |
The invention relates to compounds of the general formula (1)(R1R2X1Si((R3)aCp))((R4)aCp)M(X2)n(1)in which R1 and R2=independently of one another an alkyl or aryl radical, X1=F, Cl, Br, I, p-tolylSO3-, F3CSO3-, F3CCO2- or H3CCO2-, R3 and R4=identical or different alkyl, alkyl ether, aryl or aryl ether groups where 0</=a</=4, Cp=a cyclopentadienyl, indenyl, tetrahydroindenyl or fluorenyl radical, M=a transistion metal from groups 3-6 (IUPAC notation), in particular Ti, Zr or Hf, X2=F, Cl, Br or I, the oxidation number of the transition metal minus 2. Also disclosed is a process of making compounds of formula (1) by reacting the metallocene counterpart thereof with acid HX1.
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