Indenylidene Ruthenium Complex Bearing a Sterically Demanding NHC Ligand: An Efficient Catalyst for Olefin Metathesis at Room Temperature

Herve Clavier, Cesar A. Urbina-Blanco, Steven Patrick Nolan

Research output: Contribution to journalArticlepeer-review

106 Citations (Scopus)

Abstract

The synthesis and characterization of a novel indenylidene-containing ruthenium catalyst bearing the N-heterocyclic carbene (NHC) ligand 1,3-bis(2,6-diisopropylphenyl)-4,5-dihydroimidazol-2-ylidene (SIPr) are reported. Comparative reactivity studies with other indenylidene complexes using various substrates show the importance of the sterically demanding SIPr ligand on catalyst reaction profile. The investigation of the reaction scope for ring-closing metathesis transformations establishes the influence of the NHC on catalyst activity especially as a function of substrate steric bulk. The novel catalyst was found very efficient at room temperature for nonsterically hindered substrates. Since the new catalyst was found to be soluble in a variety of solvents, a number of these were examined to gauge the importance of solvent effects.

Original languageEnglish
Pages (from-to)2848-2854
Number of pages7
JournalOrganometallics
Volume28
Issue number9
DOIs
Publication statusPublished - 11 May 2009

Keywords

  • RING-CLOSING METATHESIS
  • N-HETEROCYCLIC-CARBENE
  • ALLENYLIDENE COMPLEXES
  • ALKENE METATHESIS
  • CROSS-METATHESIS
  • TRANSFORMATIONS
  • RUCL2(=CHR)(PR(3))(2)
  • POLYMERIZATION
  • INITIATORS
  • MECHANISM

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