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Poster (Scientific congresses and symposiums)
New ruthenium catalysts bearing N-heterocyclic carbene ligands for ATRP
Sauvage, Xavier; Richel, Aurore; Delfosse, Sébastien et al.
2003Recent Progress in Macromolecular Chemistry
 

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Abstract :
[en] Stable nucleophilic N-heterocyclic carbenes (NHCs) are neutral, two-electron ligands with a negligible p-back-bonding tendency. They behave as phosphine mimics, yet they are better s- donors and they form stronger bonds to metal centers than most phosphines. Their electronic and steric properties are liable to ample modification simply by varying the substituents on the nitrogen atoms. Therefore, NHCs constitute a promising new class of ligands available for catalyst engineering and fine-tuning. We found that the 18-electron complex RuCl2(p-cymene)(PCy3) was a versatile and efficient promoter for ring-opening metathesis polymerization of both strained and low-strain cyclic olefins when activated by a suitable precursor such as trimethylsilyldiazomethane. This complex was also an excellent catalyst for ATRP (Atom Transfer Radical Polymerization) of MMA and styrene. In this poster, we present preliminary results obtained in olefin metathesis and in radical reactions (ATRP and Kharasch addition) when tricyclohexylphosphine was substituted by an N-heterocylic carbene ligand.
Disciplines :
Chemistry
Author, co-author :
Sauvage, Xavier ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Richel, Aurore  ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Delfosse, Sébastien
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
Noels, Alfred ;  Université de Liège - ULiège > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences)
Language :
English
Title :
New ruthenium catalysts bearing N-heterocyclic carbene ligands for ATRP
Publication date :
May 2003
Number of pages :
A0
Event name :
Recent Progress in Macromolecular Chemistry
Event organizer :
CERM (Centre d'Etude et de Recherche sur les Macromolecules) , Université de Liège
Event place :
Liege, Belgium
Event date :
16 mai 2003
Available on ORBi :
since 07 June 2010

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