The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2007
Filed:
Jul. 29, 2003
Wolfgang Anton Herrmann, Freising, DE;
Wolfgang Schattenmann, Burghausen, DE;
Thomas Weskamp, Munich, DE;
Wolfgang Anton Herrmann, Freising, DE;
Wolfgang Schattenmann, Burghausen, DE;
Thomas Weskamp, Munich, DE;
Degussa AG, , DE;
Abstract
Alkylidene complexes of ruthenium containing N-heterocyclic carbene ligands and their use as highly active, selective catalysts for olefin metathesis The invention relates to a complex of ruthenium of the structural formula I, where Xand Xare identical or different and are each an anionic ligand, The invention further relates to a process for preparing acyclic olefins having two or more carbon atoms or/and cyclic olefins having four or more carbon atoms from acyclic olefins having two or more carbon atoms or/and from cyclic olefins having four or more carbon atoms by an olefin metathesis reaction in the presence of at least one catalyst, wherein a complex is used as catalyst and R', R′, R′and R′are hydrogen or/and hydrocarbon groups.