Process for the preparation of a chiral stereorigid metallocene

US5103030A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Jurgen Rohrmann · Kelkheim, DE
• Wolfgang Anton Herrmann · Freising, DE

Key dates

• Filing date: Apr 30, 1991
• Grant date: Apr 7, 1992
• Expiry date: Apr 30, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/943
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A chiral, stereorigid metallocene compound of the formula I EQU [R.sup.1 R.sup.2 Si(indenyl)2]Y.sup.2 X (I) (me.sup.2 =Ti, Zr or Hf) which is produced as a virtually pure racemate and can be used as a catalyst component for the polymerization of 1-olefins is obtained by reacting a silylindenyl compound of the formula II EQU [R.sup.1 R.sup.2 Si(indenyl).sub.2 ]Me.sub.2.sup.1 (II) (Me.sup.1 =alkali metal) with a titanium, zirconium or hafnium tetrahalide.