title: Cycloalkyl-based unsymmetrical unsaturated (U₂)-NHC ligands: flexibility and dissymmetry in ruthenium-catalysed olefin metathesis.
abstract: Air-stable Ru-indenylidene and Hoveyda-type complexes bearing new unsymmetrical unsaturated N-heterocyclic carbene (U2-NHC) ligands combining a mesityl unit and a flexible cycloalkyl moiety as N-substituents were synthesised. Structural features, chemical stabilities and catalytic profiles in olefin metathesis of this new library of cycloalkyl-based U2-NHC Ru complexes were studied and compared with their unsymmetrical saturated NHC-Ru homologues as well as a set of commercially available Ru-catalysts bearing either symmetrical SIMes or IMes NHC ligands.
authors.affiliation: Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, OMC Team, 11 allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France. marc.mauduit@ensc-rennes.fr.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Rouen
authors.forename: Etienne
authors.initials: E
authors.lastname: Borré
authors.forename: Laura
authors.initials: L
authors.lastname: Falivene
authors.forename: Loic
authors.initials: L
authors.lastname: Toupet
authors.forename: Mikaël
authors.initials: M
authors.lastname: Berthod
authors.forename: Luigi
authors.initials: L
authors.lastname: Cavallo
authors.forename: Hélène
authors.initials: H
authors.lastname: Olivier-Bourbigou
authors.forename: Marc
authors.initials: M
authors.lastname: Mauduit