title: The osmium-silicon triple bond: synthesis, characterization, and reactivity of an osmium silylyne complex.
abstract: The first silylyne complex of a metal beyond group 6, [Cp*((i)Pr3P)(H)Os≡Si(Trip)][HB(C6F5)3], was prepared by a new synthetic route involving hydride abstraction from silicon. NMR and DFT computations support the presence of a silylyne ligand, and NBO and ETS-NOCV analysis revealed the nature of this Os-Si interaction as a triple bond consisting of a covalent σ bond and two strong π back-donations. The discovery of this complex allowed observations of the first cycloadditions involving a silylyne complex, and terminal alkynes are shown to react via C-H bond additions across the Os≡Si bond.
authors.affiliation: Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, USA.
authors.forename: Paul G
authors.initials: PG
authors.lastname: Hayes
authors.forename: Zhenggang
authors.initials: Z
authors.lastname: Xu
authors.forename: Chad
authors.initials: C
authors.lastname: Beddie
authors.forename: Jason M
authors.initials: JM
authors.lastname: Keith
authors.forename: Michael B
authors.initials: MB
authors.lastname: Hall
authors.forename: T Don
authors.initials: TD
authors.lastname: Tilley