[en] In this chapter, we summarize the main results of our investigations on the ring-opening metathesis polymn. (ROMP) of cyclooctene catalyzed by various ruthenium (Ru)-arene complexes bearing imidazolin-2-ylidene, imidazolidin-2-ylidene, or triazolin-5-ylidene ligands. Three major findings emerged from this study. First, we underscored the intervention of a photochem. activation step due to visible light illumination. Second, we established that the presence of an endocyclic double bond in the carbene ligand central heterocycle was not crucial to achieve high catalytic efficiencies. Third, we demonstrated that ortho-metalation of the N-heterocyclic carbene (NHC) ligand by the Ru center led to inactive catalysts.
Disciplines :
Chemistry
Author, co-author :
Delaude, Lionel ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie macromoléculaire et catalyse organique
Demonceau, Albert ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie macromoléculaire et catalyse organique
Language :
English
Title :
Olefin metathesis with ruthenium-arene catalysts bearing N-heterocyclic carbene ligands
Publication date :
2007
Main work title :
Metathesis Chemistry. From nanostructure design to synthesis of advanced materials
Editor :
Dragutan, Valerian
Imamoglu, Yavuz
Publisher :
Springer, Dordrecht, Netherlands
ISBN/EAN :
978-1-4020-6090-8
Collection name :
NATO science series II. Mathematics, Physics and Chemistry 243