Ruthenium Complexes Bearing Two N-Heterocyclic Carbene Ligands in Low Catalyst Loading Olefin Metathesis Reactions

Xavier Bantreil, Rebecca A. M. Randall, Alexandra M. Z. Slawin, Steven P. Nolan

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

The synthesis of ruthenium indenylidene complexes containing mixed N-heterocyclic carbene ligands featuring one sterically small NHC [IMeMe (1,3,4,5-tetramethylimidazol-2-ylidene), (IPrMe)-Pr-i (1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene), and ICy (1,3-dicyclohexylimidazol-2-ylidene)] and one larger congener SIMes (1,3-bis-(2,4,6 trimethylphenyl)imidazolin-2-ylidene) is described. Characterization by X-ray diffraction allowed for calculation of percent buried volume of the small NHCs in these complexes and for speculation on the relationship NHC/catalytic activity. In addition, these complexes displayed an enhanced stability but also a high ability to promote ring-closing metathesis reactions at catalyst loadings as low as 0.05 mol %.

Original languageEnglish
Pages (from-to)3007-3011
Number of pages5
JournalOrganometallics
Volume29
Issue number13
Early online date4 Jun 2010
DOIs
Publication statusPublished - 12 Jul 2010

Keywords

  • RING-CLOSING METATHESIS
  • INDENYLIDENE COMPLEXES
  • TETRASUBSTITUTED OLEFINS
  • EFFICIENT
  • PHOSPHINE
  • TRANSFORMATIONS
  • POLYMERIZATION
  • BENZYLIDENE
  • LIMITATIONS
  • KETONES

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