title: Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis.
abstract: A method for the synthesis of a homogeneous cationic tungsten(vi)pentamethyl complex [(WMe5)+(C6F5)3BMe-] from neutral tungstenhexamethyl (WMe6) and a silica supported cationic tungstentetramethyl complex [([triple bond, length as m-dash]Si-O-)WMe4+(C6F5)3BMe-] from a neutral silica supported tungstenpentamethyl complex [([triple bond, length as m-dash]Si-O-)WMe5] is described. In both cases a direct demethylation using the B(C6F5)3reagent was used. The aforesaid complexes were characterized by liquid or solid state NMR spectroscopy. Interestingly, the homogeneous cationic complex [(WMe5)+(C6F5)3BMe-] shows moderate activity whereas the supported cationic complex [([triple bond, length as m-dash]Si-O-)WMe4+(C6F5)3BMe-] exhibits good activity in olefin metathesis reactions.
authors.affiliation: King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia. jeanmarie.basset@kaust.edu.sa.
authors.forename: Raju
authors.initials: R
authors.lastname: Dey
authors.affiliation: King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia. jeanmarie.basset@kaust.edu.sa.
authors.forename: Manoja K
authors.initials: MK
authors.lastname: Samantaray
authors.affiliation: King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia. jeanmarie.basset@kaust.edu.sa and Institut de Quìmica Computacional i Catàlisi and Departament de Quìmica, Universitat de Girona, Campus de Montilivi, 17003 Girona, Catalonia, Spain.
authors.forename: Albert
authors.initials: A
authors.lastname: Poater
authors.affiliation: King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia. jeanmarie.basset@kaust.edu.sa.
authors.forename: Ali
authors.initials: A
authors.lastname: Hamieh
authors.affiliation: King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia. jeanmarie.basset@kaust.edu.sa.
authors.forename: Santosh
authors.initials: S
authors.lastname: Kavitake
authors.affiliation: King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia. jeanmarie.basset@kaust.edu.sa.
authors.forename: Edy
authors.initials: E
authors.lastname: Abou-Hamad
authors.affiliation: King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia. jeanmarie.basset@kaust.edu.sa.
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Callens
authors.affiliation: Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
authors.forename: Abdul-Hamid
authors.initials: AH
authors.lastname: Emwas
authors.affiliation: King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia. jeanmarie.basset@kaust.edu.sa.
authors.forename: Luigi
authors.initials: L
authors.lastname: Cavallo
authors.affiliation: King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia. jeanmarie.basset@kaust.edu.sa.
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Basset