| 摘要 |
The present invention relates to a process for preparing a metallocene, which comprises reacting a ligand starting compound with an adduct of the formula (I), <?in-line-formulae description="In-line Formulae" end="lead"?>M<SUP>1</SUP>X<SUB>n</SUB>D<SUB>a</SUB> (I)<?in-line-formulae description="In-line Formulae" end="tail"?> where M<SUP>1 </SUP>is a metal of group III, IV, V or VI of the Periodic Table of the Elements or an element of the lanthanide or actinide series, preferably titanium, zirconium or hafnium, particularly preferably zirconium, X are identical or different and are each halogen, C<SUB>1</SUB>-C<SUB>10</SUB>-alkoxy, C<SUB>6</SUB>-C<SUB>10</SUB>-aryloxy, C<SUB>1</SUB>-C<SUB>10</SUB>-alkylsulfonate such as mesylate, triflate, nonaflate, C<SUB>6</SUB>-C<SUB>10</SUB>-arylsulfonate such as tosylate, benzenesulfonate, C<SUB>1</SUB>-C<SUB>10</SUB>-alkylcarboxylate such as acetate, formate, oxalate or 1,3-dicarbonylate such as acetylacetonate or fluorinated 1,3-dicarbonylate, in particular chlorine, bromine, particularly preferably chlorine, n is an integer and is 2,3,4,5 or 6 and corresponds to the oxidation number of the metal M<SUP>1</SUP>, a is an integer or fraction and 0<a<=4 and a is preferably in the range from 0.5 to 2.5 and is in particular 1, 1.5 or 2, and D is a linear, cyclic or branched oligoether or polyether containing at least two oxygen atoms or an oligothioether or polythioether containing at least two sulfur atoms.
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