title: Cobalt fluorocarbenes: cycloaddition reactions with tetrafluoroethylene and reactivity of the perfluorometallacyclic products.
abstract: Cobalt fluorocarbene complexes CpCo(═CFR(F))(PPh2Me) (Cp = η(5)-C5H5, R(F) = F or CF3) react with tetrafluoroethylene to give the metallacyclobutanes CpCo(κ(2)-CFR(F)CF2CF2-)(PPh2Me) in the first examples of cycloaddition reactions between perfluoroalkenes and metal perfluorocarbenes. The metallacyclic products undergo a variety of reactions upon activation of the C-F bonds, including Brønsted acid-catalyzed C-F/Co-C scrambling. Implications for metal-catalyzed metathesis and polymerization of perfluoroalkenes are discussed.
authors.affiliation: Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa , 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Harrison
authors.forename: Graham M
authors.initials: GM
authors.lastname: Lee
authors.forename: Matthew C
authors.initials: MC
authors.lastname: Leclerc
authors.forename: Ilia
authors.initials: I
authors.lastname: Korobkov
authors.forename: R Tom
authors.initials: RT
authors.lastname: Baker