title: New aryloxybenzylidene ruthenium chelates - synthesis, reactivity and catalytic performance in ROMP.
abstract: New phenoxybenzylidene ruthenium chelates were synthesised from the second generation Grubbs catalysts bearing a triphenylphosphine ligand (or its para-substituted analogues) by metathesis exchange with substituted 2-vinylphenols. The complexes behave like a latent catalyst and are characterized by an improved catalytic behaviour as compared to that of the known analogues, i.e., they exhibit high catalytic inactivity in their dormant forms and a profound increase in activity after activation with HCl. The strong electronic influence of substituents in the chelating ligand on the catalytic activity was demonstrated. The catalytic properties were tested in ROMP of cyclooctadien (COD) and a single selected norbornene derivative.
authors.affiliation: Adam Mickiewicz University in Poznań, Faculty of Chemistry, Umultowska 89b, 61-614 Poznań, Poland.
authors.forename: Patrycja
authors.initials: P
authors.lastname: Żak
authors.affiliation: Adam Mickiewicz University in Poznań, Faculty of Chemistry, Umultowska 89b, 61-614 Poznań, Poland.
authors.forename: Szymon
authors.initials: S
authors.lastname: Rogalski
authors.affiliation: Adam Mickiewicz University in Poznań, Faculty of Chemistry, Umultowska 89b, 61-614 Poznań, Poland.
authors.forename: Mariusz
authors.initials: M
authors.lastname: Majchrzak
authors.affiliation: Adam Mickiewicz University in Poznań, Faculty of Chemistry, Umultowska 89b, 61-614 Poznań, Poland.
authors.forename: Maciej
authors.initials: M
authors.lastname: Kubicki
authors.affiliation: Adam Mickiewicz University in Poznań, Faculty of Chemistry, Umultowska 89b, 61-614 Poznań, Poland.
authors.forename: Cezary
authors.initials: C
authors.lastname: Pietraszuk
keywords: ROMP; chemoactivation; latent catalysts; metathesis; ruthenium