Dioxygen Reactivity with a Ferrocene–Lewis Acid Pairing: Reduction to a Boron Peroxide in the Presence of Tris(pentafluorophenyl)borane

Authors

  • Justin T. Henthorn,

    1. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125 MC 127-72 (USA)
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  • Prof. Theodor Agapie

    Corresponding author
    1. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125 MC 127-72 (USA)
    • Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125 MC 127-72 (USA)

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  • We thank Lawrence M. Henling and Dr. Michael Takase for crystallographic assistance. We are grateful to Caltech and NSF GRFP (J.T.H.) for funding.

Abstract

Ferrocenes, which are typically air-stable outer-sphere single-electron transfer reagents, were found to react with dioxygen in the presence of B(C6F5)3, a Lewis acid unreactive to O2, to generate bis(borane) peroxide. Although several Group 13 peroxides have been reported, boron-supported peroxides are rare, with no structurally characterized examples of the BO2B moiety. The synthesis of a bis(borane)-supported peroxide anion and its structural and electrochemical characterization are described.

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