Organometallic compounds

US6248912A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Heinrich Lang · Ergersheim, DE
• Thomas Weiss · Tamm, DE
• Sigurd Becke · Rösrath, DE

Key dates

• Filing date: Feb 26, 1999
• Grant date: Jun 19, 2001
• Expiry date: Feb 26, 2019

Classification

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

Abstract

Organometallic compounds of transition metals containing optionally tetrahydrogenated 2-indenyl as a first ligand of the formula ##STR1## wherein A represents the benzo system or the tetrahydrocyclohexyl system and the other symbols have the range of meanings given in the description, are prepared by reaction of ##STR2## with Mg or Zn and with a dihalide Hal.sup.2 --Y--Hal.sup.3 (III) to form the novel intermediates ##STR3## further reaction with ZM.sup.2.sub.p (Va) or ZR.sup.9.sub.p (Vb) to form ##STR4## and further reaction with a transition metal compound of the formula M.sup.1 X.sub.q (VIII). Many compounds (I) are not C2-symmetrical. The compounds (I) can be used as catalysts for the (co)polymerization of olefins, diolefins and/or cycloolefins.