title: Ruthenium-indenylidene olefin metathesis catalyst with enhanced thermal stability.
abstract: Two new ruthenium complexes bearing a bidentate (κ(2)O,C)-isopropoxy-indenylidene ligand and a PPh(3) (9) or PCy(3) (10, Cy=cyclohexyl) ligand have been synthesized and fully characterized by (1)H and (13)C NMR spectroscopy and X-ray crystallography. Complex 10 displays a very high thermal stability with a half life of six days at 110 °C in [D(8)]toluene. Complex 10 was evaluated in various ring-closing metathesis reactions and ring-opening metathesis polymerization of dicyclopentadiene, in which it showed a latent behavior with low activity at room temperature and high activity upon thermal activation.
authors.affiliation: Sciences Chimiques de Rennes, Catalyse et Organométalliques, UMR 6226 CNRS Université de Rennes 1, Campus de Beaulieu, 263 Avenue du Général Leclerc, 35042 Rennes, France.
authors.forename: Anzhelika
authors.initials: A
authors.lastname: Kabro
authors.forename: Thierry
authors.initials: T
authors.lastname: Roisnel
authors.forename: Cédric
authors.initials: C
authors.lastname: Fischmeister
authors.forename: Christian
authors.initials: C
authors.lastname: Bruneau