title: WMe6 tamed by silica: ≡Si-O-WMe5 as an efficient, well-defined species for alkane metathesis, leading to the observation of a supported W-methyl/methylidyne species.
abstract: The synthesis and full characterization of a well-defined silica-supported ≡Si-O-W(Me)5 species is reported. Under an inert atmosphere, it is a stable material at moderate temperature, whereas the homoleptic parent complex decomposes above -20 °C, demonstrating the stabilizing effect of immobilization of the molecular complex. Above 70 °C the grafted complex converts into the two methylidyne surface complexes [(≡SiO-)W(≡CH)Me2] and [(≡SiO-)2W(≡CH)Me]. All of these silica-supported complexes are active precursors for propane metathesis reactions.
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Manoja K
authors.initials: MK
authors.lastname: Samantaray
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Callens
authors.forename: Edy
authors.initials: E
authors.lastname: Abou-Hamad
authors.forename: Aaron J
authors.initials: AJ
authors.lastname: Rossini
authors.forename: Cory M
authors.initials: CM
authors.lastname: Widdifield
authors.forename: Raju
authors.initials: R
authors.lastname: Dey
authors.forename: Lyndon
authors.initials: L
authors.lastname: Emsley
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Basset