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. © 2014 the Partner Organisations.

Citation
Rouen, M., Borré, E., Falivene, L., Toupet, L., Berthod, M., Cavallo, L., … Mauduit, M. (2014). Cycloalkyl-based unsymmetrical unsaturated (U2)-NHC ligands: flexibility and dissymmetry in ruthenium-catalysed olefin metathesis. Dalton Trans., 43(19), 7044–7049. doi:10.1039/c4dt00142g

Acknowledgements
This work was financed by the European Community through the seventh framework program (CP-FP 211468-2 EUMET, grant to MR, LF and EB). MM thanks the Agence Nationale de la Recherche (grant ANR-12-CD2I-0002 CFLOW-OM), Rennes Metropole and the Region-Bretagne for their financial support concerning the development of Ru-based complexes. Dr O. Basle and C. Crevisy are gratefully acknowledged for their helpful discussion.

Publisher
Royal Society of Chemistry (RSC)

Journal
Dalton Transactions

DOI
10.1039/c4dt00142g

Relations
Is Supplemented By:
  • [Dataset]
    Rouen, M., Borré, E., Falivene, L., Toupet, L., Berthod, M., Cavallo, L., … Mauduit, M. (2014). CCDC 843466: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/ccx9plg. DOI: 10.5517/ccx9plg HANDLE: 10754/624657
  • [Dataset]
    Rouen, M., Borré, E., Falivene, L., Toupet, L., Berthod, M., Cavallo, L., … Mauduit, M. (2014). CCDC 876822: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/ccyfdlb. DOI: 10.5517/ccyfdlb HANDLE: 10754/624691
  • [Dataset]
    Rouen, M., Borré, E., Falivene, L., Toupet, L., Berthod, M., Cavallo, L., … Mauduit, M. (2014). CCDC 890262: Experimental Crystal Structure Determination [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/ccywd4b. DOI: 10.5517/ccywd4b HANDLE: 10754/624729

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