title: Facile migratory insertion of a N-heterocyclic carbene into a ruthenium-carbon double bond: a new type of reaction of a NHC ligand.
abstract: The reaction of [RuCp(IPri)(CH3CN)2]PF6 (IPri = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) with HCCR (R = COOMe, COOEt, COMe) yields the allyl carbene complexes [RuCp(=C(R)-eta3-CHC(R)CH-IPri)]PF6. This conversion involves selective head-to-tail coupling of two alkynes and an unusual migratory insertion of the N-heterocyclic carbene into the ruthenium-carbon double bond of a ruthenacyclopentatriene intermediate.
authors.affiliation: Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria.
authors.forename: Eva
authors.initials: E
authors.lastname: Becker
authors.forename: Verena
authors.initials: V
authors.lastname: Stingl
authors.forename: Georg
authors.initials: G
authors.lastname: Dazinger
authors.forename: Michael
authors.initials: M
authors.lastname: Puchberger
authors.forename: Kurt
authors.initials: K
authors.lastname: Mereiter
authors.forename: Karl
authors.initials: K
authors.lastname: Kirchner