Targor Gmbh

Basell Polyolefine Gmbh

Berthold Schiemenz

Michael Riedel

Frank Kuber

Carsten Bingel

Walter Kaminsky

Frank K&uuml;ber

Frank Kueber

Frank Freidanck

Frank Ber

Anne-Meike Schauwienold

Markus Res

Markus Göres

Ralf Werner

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),MXD&#x2003;&#x2003;(I)

Method for producing metallocenes

A stereorigid metallocene compound contains, as ligands, an aryl-substituted cyclopentadienyl radical, linked via a hydrogen bridge, and a substituted or unsubstituted fluorenyl radical. The novel metallocene compound is suitable as a catalyst component for olefin polymerization.

Stereorigid metallocene compounds

The present invention relates to a process for preparing a methylene-bridged biscyclopentadienyl compound having the formula I

Process for preparing a methylene-bridged biscyclopentadienyl compound

Process for preparing a methylene-bridged cyclopentadienyl compound The present invention relates to a process for preparing a methylene-bridged biscyclopentadienyl compound having the formula I ##STR1## Where L are, independently of one another, identical or different and are each a cyclopentadienyl group, by reactin one or two cyclopentadienyl compounds LH with formaldehyde in monomeric, oligomeric or polymeric form or formaldehyde-generating reagents in the presence of at least one base and at least one phase transfer catalyst.

The present invention relates to a stereorigid metallocene compound which has as ligands at least two substituted or unsubstituted cyclopentadienyl groups which are connected to one another via a five-membered ring, where at least one cyclopentadienyl group is fuzed to the five-membered ring and the ligand system of the stereorigid metallocene compound is different from 4-�(.eta..sup.5 -3'-alkyl-cyclopentadienyl)-4,6,6-trimethyl-(.eta..sup.5 -2-alkyl-4,5-tetrahydropentalene)!. The metallocene compound of the invention is suitable as a catalyst component for olefin polymerization.

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Frankfurt-am-Main, Germany

Berthold Schiemenz