title: Trinuclear palladium addition to unsaturated carbocycles.
abstract: The trinuclear palladium addition to monocyclic unsaturated hydrocarbons was revealed. The trinuclear adduct of [2.2]paracyclophane, cycloheptatriene (CHT), or cyclooctatetraene (COT) was obtained by treatment of the corresponding tripalladium sandwich complexes with 3 equiv. of 1,10-phenanthroline. In the trinuclear adduct of [2.2]paracyclophane or CHT, a Pd2 unit and a Pd1 unit synfacially coordinate through a (μ-η(3)-allyl):(η(3)-allyl) manner. A trinuclear adduct of COT exhibited an unusual bonding structure in which a formally tetraanionic COT coordinates to three Pd(II) centers through a synfacial η(3):η(1):η(3):η(1) coordination mode. The tetraanionic COT ligand bearing three Pd(II) moieties undergoes a unique intramolecular 1,5-C-C coupling.
authors.affiliation: Institute for Molecular Science, Myodaiji, Okazaki, Aichi, Japan. mura@ims.ac.jp
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Murahashi
authors.forename: Kohei
authors.initials: K
authors.lastname: Takase
authors.forename: Kentaro
authors.initials: K
authors.lastname: Usui
authors.forename: Seita
authors.initials: S
authors.lastname: Kimura
authors.forename: Mayu
authors.initials: M
authors.lastname: Fujimoto
authors.forename: Tomohito
authors.initials: T
authors.lastname: Uemura
authors.forename: Sensuke
authors.initials: S
authors.lastname: Ogoshi
authors.forename: Koji
authors.initials: K
authors.lastname: Yamamoto