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Filtering by: Advisor Gable, Kevin Remove constraint Advisor: Gable, Kevin Subject Rhenium catalysts Remove constraint Subject: Rhenium catalysts

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  • Mechanistic studies on Re(V) mediated C-O bond transformations

    Creator:
    Zhuravlev, Fedor
    Abstract:
    In situ, reduction of Cp*ReO₃ by PPh₃ to form (Cp*ReO)₂(μ-O)₂ allows catalytic deoxygenation of epoxides, however, conproportionation between Reⱽ and Reⱽᴵᴵ species to form clusters of ((Cp*Re)₃(μ-O)₆}²⁺(ReO₄⁻)2 and new compound {(Cp*Re)₃(μ²-O)₃(μ³-O⁾³ReO₃}⁺(ReO₄⁻) leads to removal of rhenium from the catalytic cycle and loss of activity, The epoxide deoxygenation mediated by (Cp*ReO)₂(μ-O)₂...
    Resource Type:
    Dissertation
    Full Text:
    (V Mediated 0-0 Bond Transfor- mations. Abstract Approved: Kevin Gable In situ, reduction of Cp

  • Rhenium-catalyzed oxygen-atom transfer reactions : mechanism and applications

    Creator:
    Brown, Eric C.
    Abstract:
    In situ reduction of hydrido-tris-(3,5-dimethylpyrazolyl)borato(trioxo) rhenium(V) with triphenylphosphine or triethylphosphite leads to a reactive rhenium(V) species that catalytically deoxygenates epoxides at 75-105°C. The reaction is stereospecific, except for trans- and cis-butene oxide which formed minor amounts of the opposite isomer. A variety of different functional groups were tolerated and even...
    Resource Type:
    Dissertation
    Full Text:
    ACKNOWLEDGMENTS I would like to sincerely thank Prof. Kevin Gable for all his assistance, guidance and

  • Direct atom transfer vs. ring expansion in reaction of rhenium oxo complexes with cyclooctene epoxides and episulfides

    Creator:
    Khownium, Kriangsak
    Abstract:
    The rhenium (V) complex Tp'ReO₂ (Tp' = hydrido-tris-(3,5- dimethylpyrazolyl)borate), generated in situ from PPh₃ reduction of Tp'Re0₃, reacts with small ring heterocycles such as epoxides and episulf ides. The strained trans-cyclooctene ring provides an unusual thermodynamic bias against direct atom transfer, but trans-cyclooctene oxide still produces substantial amounts of trans-cyclooctene....
    Resource Type:
    Masters Thesis
    Full Text:
    standard referencing practices of the discipline. I deeply acknowledge Prof. Kevin Gable for all his