Homobimetallic and heterobimetallic alkylidene complexes of ruthenium containing N-heterocyclic carbene ligands

US6787620B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Wolfgang Anton Herrmann · Freising, DE
• Florian J. Kohl · Hersbruck, DE
• Thomas Weskamp · Munich, DE

Key dates

• Filing date: Feb 20, 2003
• Grant date: Sep 7, 2004
• Expiry date: May 12, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2531/30
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to complexes of ruthenium of the structural formula I whereX is an anionic ligand,Z is a monodentate to tridentate ligand which contains a metal and is nonionically bound to the ruthenium center,R1 and R2 are identical or different and are each hydrogen or/and a hydrocarbon group, but may also form a ring, andLigand L is an N-heterocyclic carbene, and also to a process for preparing acyclic olefins having two or more carbon atoms or/and cyclic olefins having three or more carbon atoms and the use of at least one complex of the formula I in olefin metathesis.