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    Understanding the Hydro-metathesis Reaction of 1-decene by Using Well-defined Silica Supported W, Mo, Ta Carbene/Carbyne Complexes

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    Type
    Article
    Authors
    Saidi, Aya cc
    Samantaray, Manoja
    Tretiakov, Mykyta cc
    Kavitake, Santosh Giridhar
    Basset, Jean-Marie cc
    KAUST Department
    Chemical Science Program
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Date
    2018-02-22
    Online Publication Date
    2018-02-22
    Print Publication Date
    2018-04-24
    Permanent link to this record
    http://hdl.handle.net/10754/626771
    
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    Abstract
    Direct conversion of 1-decene to petroleum range alkanes was obtained using hydro-metathesis reaction. To understand this reaction we employed three different well-defined single site catalysts precursors; [(≡Si-O-)W(CH3)5] 1, [(≡Si-O-)Mo(≡CtBu)(CH2tBu)2] 2 and [(≡Si-O)Ta(=CHtBu)(CH2tBu)2] 3. We witnessed that in our conditions olefin metathesis/isomerization of 1-decene occurs much faster followed by reduction of the newly formed olefins rather than reduction of the 1-decene to decane, followed by metathesis of decane. We found that Mo-based catalyst favors 2+2 cycloaddition of 1-decene forming metallocarbene, followed by reduction of the newly formed olefins to alkanes. However, in the case of W and Ta-based catalysts, a rapid isomerization (migration) of the double bond followed by olefin metathesis and reduction of the newly formed olefins were observed. We witnessed that silica supported W catalyst precursor 1 and Mo catalyst precursor 2 are better catalysts for hydro-metathesis reaction with TONs of 818 and 808 than Ta-based catalyst 3 (TON of 334). This comparison of the catalysts provides us a better understanding that, if a catalyst is efficient in olefin metathesis reaction it would be a better catalyst for hydro-metathesis reaction.
    Citation
    Saidi A, Samantaray M, Tretiakov M, Kavitake S, Basset J-M (2017) Understanding the Hydro-metathesis Reaction of 1-decene by Using Well-defined Silica Supported W, Mo, Ta Carbene/Carbyne Complexes. ChemCatChem. Available: http://dx.doi.org/10.1002/cctc.201701993.
    Sponsors
    The authors acknowledge the KAUST ACL Core Lab. This work was supported by funds from King Abdullah University of Science and Technology
    Publisher
    Wiley
    Journal
    ChemCatChem
    DOI
    10.1002/cctc.201701993
    Additional Links
    http://onlinelibrary.wiley.com/doi/10.1002/cctc.201701993/abstract
    ae974a485f413a2113503eed53cd6c53
    10.1002/cctc.201701993
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

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