Mechanism of ruthenium-catalyzed olefin metathesis reactions from a theoretical perspective

Luigi Cavallo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

242 Scopus citations

Abstract

This paper presents a density functional theory study of the ruthenium-catalyzed olefin metathesis reactions. The ligand binding energy has been calculated in the first generation of Grubbs-type (PCy3)2-Cl2Ru=CHPh (pre)catalyst, as well as in the heteroleptic (pre)catalytic systems in which a N-heterocyclic carbene, NHC, ligand substitutes a single phosphine. In agreement with experiments PCy3 coordinates more strongly to Ru in the heteroleptic (pre)catalysts than in the Grubbs-type (pre)catalyst. Moreover, ethene coordination and insertion into the Ru-alkylidene bond in the above-mentioned systems, as well as in the Hofmann type catalytic system with a cis-coordinated phosphane ligand, has been studied. The calculated insertion barrier for the NHC systems are lower than that of the (PCy3)2Cl2Ru=CHPh system. This is consistent with the higher activity experimentally observed for the NHC-based system.

Original languageEnglish (US)
Pages (from-to)8965-8973
Number of pages9
JournalJournal of the American Chemical Society
Volume124
Issue number30
DOIs
StatePublished - Jul 31 2002

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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