title: SOMC-Designed Silica Supported Tungsten Oxo Imidazolin-2-iminato Methyl Precatalyst for Olefin Metathesis Reactions.
abstract: Synthesis, structure, and olefin metathesis activity of a surface complex [(≡Si-O-)W(═O)(CH3)2-ImDippN] (4) (ImDipp= 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-iminato) supported on silica by a surface organometallic chemistry (SOMC) approach are reported. The reaction of N-silylated 2-iminoimidazoline with tungsten(VI) oxytetrachloride generated the tungsten oxo imidazolin-2-iminato chloride complex [ImDippNW(═O)Cl3] (2). This was grafted on partially dehydroxylated silica pretreated at 700 °C (SiO2-700) to afford a well-defined monopodal surface complex [(≡Si-O-)W(═O)Cl2-ImDippN] (3). 3 underwent alkylation by ZnMe2to produce [(≡Si-O-)W(═O)(CH3)2-ImDippN] (4). The alkylated surface complex was thoroughly characterized by solid-state NMR, elemental microanalysis, Raman, FT-IR spectroscopies, and XAS analysis. 4 proved to be an active precatalyst for self-metathesis of terminal olefins such as propylene and 1-hexene.
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Ziyauddin S
authors.initials: ZS
authors.lastname: Qureshi
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Ali
authors.initials: A
authors.lastname: Hamieh
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Samir
authors.initials: S
authors.lastname: Barman
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Niladri
authors.initials: N
authors.lastname: Maity
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Manoja K
authors.initials: MK
authors.lastname: Samantaray
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Samy
authors.identifier: http://orcid.org/0000-0002-3486-0944
authors.initials: S
authors.lastname: Ould-Chikh
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Edy
authors.initials: E
authors.lastname: Abou-Hamad
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Laura
authors.initials: L
authors.lastname: Falivene
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.|Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC) , 21210, Wang Chan, Rayong, Thailand.
authors.forename: Valerio
authors.initials: V
authors.lastname: D'Elia
authors.affiliation: Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Alexander
authors.initials: A
authors.lastname: Rothenberger
authors.affiliation: Institut de Recherches sur la Catalyse et l'Environnement de Lyon IRCELYON, UMR 5256, CNRS-Université Lyon 1 , 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Llorens
authors.affiliation: Institut Neel, CNRS , 25, avenue des Martyrs, F-38042 Grenoble Cedex 9, France.
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Hazemann
authors.affiliation: KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST) , 23955-6900 Thuwal, Saudi Arabia.
authors.forename: Jean-Marie
authors.identifier: http://orcid.org/0000-0003-3166-8882
authors.initials: JM
authors.lastname: Basset