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    Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis

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    Type
    Article
    Authors
    Dey, Raju cc
    Samantaray, Manoja
    Poater, Albert cc
    Hamieh, Ali Imad Ali cc
    Kavitake, Santosh Giridhar
    Abou-Hamad, Edy cc
    Callens, Emmanuel cc
    Emwas, Abdul-Hamid M.
    Cavallo, Luigi cc
    Basset, Jean-Marie cc
    KAUST Department
    Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC)
    Chemical Science Program
    Competitive Research Funds
    Imaging and Characterization Core Lab
    KAUST Catalysis Center (KCC)
    NMR
    OCRF- Special Academic Partnership
    Physical Science and Engineering (PSE) Division
    Date
    2016
    Permanent link to this record
    http://hdl.handle.net/10754/622479
    
    Metadata
    Show full item record
    Abstract
    A method for the synthesis of a homogeneous cationic tungsten(VI)penta-methyl complex [(WMe5)(+)(C6F5)(3)BMe-] from neutral tungstenhexamethyl (WMe6) and a silica supported cationic tungstentetramethyl complex [( Si-O-)WMe4+ (C6F5)(3)BMe-] from a neutral silica supported tungstenpentamethyl complex [( Si-O-)WMe5] is described. In both cases a direct demethylation using the B(C6F5)(3) reagent was used. The aforesaid complexes were characterized by liquid or solid state NMR spectroscopy. Interestingly, the homogeneous cationic complex [(WMe5)(+)(C6F5)(3)BMe-] shows moderate activity whereas the supported cationic complex [( Si-O-)WMe4+(C6F5)(3)BMe-] exhibits good activity in olefin metathesis reactions.
    Citation
    Dey R, Samantaray MK, Poater A, Hamieh A, Kavitake S, et al. (2016) Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis. Chem Commun 52: 11270–11273. Available: http://dx.doi.org/10.1039/c6cc05352a.
    Sponsors
    This work was supported by funds from the King Abdullah University of Science and Technology (KAUST) office of sponsored research (OSR). A. P. thanks the Spanish MINECO for the project CTQ2014-59832-JIN. The authors also thank Dr Nassima Riache for fruitful discussions.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Chemical Communications
    DOI
    10.1039/c6cc05352a
    Additional Links
    http://pubs.rsc.org/en/Content/ArticleLanding/2016/CC/C6CC05352A
    ae974a485f413a2113503eed53cd6c53
    10.1039/c6cc05352a
    Scopus Count
    Collections
    Articles; Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC); Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

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