title: Olefin metathesis featuring ruthenium indenylidene complexes with a sterically demanding NHC ligand.
abstract: The synthesis and characterization of two new ruthenium indenylidene complexes [RuCl(2)(SIPr)(Py)(Ind)] 6 and [RuCl(2)(SIPr)(3-BrPy)(Ind)] 7 featuring the sterically demanding N-heterocyclic carbene 1,3-bis(2,6-di isopropylphenyl)-4,5-dihydroimidazol-2-ylidene (SIPr) are reported. Remarkable activity was observed with these complexes in ring closing, enyne, and cross metathesis of olefins at low catalyst loadings. The performance of SIPr-bearing complexes 6 and 7 as well as [RuCl(2)(SIPr)(PCy(3))(Ind)] 5 in ring opening metathesis polymerization is also disclosed. This work highlights the enormous influence of the neutral "spectator" ligands on catalyst activity and stability.
authors: EaStCHEM School of Chemistry, University of St Andrews, KY16 9ST, St Andrews, UK.
authors: César A
authors: CA
authors: Urbina-Blanco
authors: Anita
authors: A
authors: Leitgeb
authors: Christian
authors: C
authors: Slugovc
authors: Xavier
authors: X
authors: Bantreil
authors: Hervé
authors: H
authors: Clavier
authors: Alexandra M Z
authors: AM
authors: Slawin
authors: Steven P
authors: SP
authors: Nolan