Basf Aktiengesellschaft

Basell Polyolefine Gmbh

Hans-Herbert Brintzinger

Franz Langhauser

David Fischer

Gunther Schweier

Jurgen Kerth

Hans-Robert-Hellmuth Damrau

Werner Roell

Carsten Bingel

Patrik Müller

Elke Barsties

G Unther Schweier

J Urgen Kerth

Stefan Mansel

Konrad Knoll

Armin Weeber

Katrin Schmidt

Wolfgang Bidell

Heike Gregorius

Josef W&uuml;nsch

Carsten S&uuml;ling

Jürgen Suhm

Frank Schaper

Nadine Leyser

Mario Huettenhofer

Stefan Schaible

Robin Kirsten

Armin Weber

Nicole Schneider

Marc Prosenc

Florian Feil

Sjoerd Harder

Eva Royo

Robert Damrau

Novel metallocene monohalides can be used in the polymerization of olefins.

Metallocene monohalogenides

The invention relates to a method for producing racemic metallocene complexes by reacting bridged or non-bridged transition metal complexes with cyclopentadienyl derivatives of alkaline or alkaline earth metals and optionally, subsequently substituting the phenolate ligands.

Method for the selective production of racemic metallocene complexes

A process for purifying metallocenes in which a sparingly soluble metallocene halide is converted into a readily soluble and readily crystallizable metallocene by replacement of at least one halide ligand by an alternative negatively charged ligand and the metallocene obtained in this way is subsequently purified by crystallization.

Method for the purification of metallocenes

Method for producing monoaryloxy-ansa-metallocenes

Heteroleptic alkaline-earth metal compounds and methods for carrying out stereoselective anionic polymerization

A process for the preparation of bisorganoalkaline earth metal compounds comprises reacting an organometallic compound R M with an alkaline earth metal salt M X .

Method for producing di-organo alkaline-earth compounds

In a process for preparing polymers based on monomers having a C&boxH;C double bond by homopolymerization or copolymerization of these monomers in the presence of a catalyst system comprising a metallocene complex A) and a compound B) capable of forming metallocenium ions and, if desired, an organometallic compound of main group I, II or III of the Periodic Table of the Elements C), the metallocene complex A) used is a compound of the formula (I)

Cyclopenta&lsqb;I&rsqb; phenanthrene-metal complex catalyst systems

Racemic metallocene complexes are prepared by reacting bridged or unbridged transition metal complexes with cyclopentadienyl derivatives of alkali metals or alkaline earth metals and, if desired, subsequently replacing the aromatic ligands.

Method for selective production of racemic metallocene complexes

Process for converting the achiral meso form of an ansa-metallocene

The present invention relates to a process for preparing racemic ansa-metallocene complexes I ##STR1## tin compounds II ##STR2## and a process for preparing tin compounds II. R.sup.1 to R.sup.9, M, and X are defined herein.

Selective preparation of racemic ansa-metallocene complexes

Metallocene complexes with cationic bridges

Process for converting the achiral meso form or the racemate of an

A process for preparing metallocene complexes of the general ##STR1## in which the substituents have the following meanings:

Preparation of bridged metallocene complexes

A process for polymerizing C.sub.2 -C.sub.10 -alk-1-enes in the presence of a metallocene complex of the formula I ##STR1## where the substituent groups have the meanings described in the specification.

Polymerization process using metallocene complexes in the catalyst system

Cyclopentadineyl compounds of the formula II ##STR1## and formula III ##STR2## their preparation and their use as intermediates in the preparation of metallocene complexes of the formula I.

Racemic metallocene complexes and their preparation

Growing community of inventors

Taegerswilen, Switzerland

Hans-Herbert Brintzinger