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Contribution of air oxygen to photooxidation of alkanes by vanadium(V) and chromium(VI) oxocomplexes

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Abstract

In photochemical oxygenation of cyclohexane by KVO3−CF3COOH or K2Cr2O7−Bu4NBr−H2O−CH2Cl2 in air the source of oxygen atoms in the product cyclohexanol and cyclohexanone is air dioxygen rather than a metal oxo-complex. In the absence of dioxygen the products of alkane oxygenation are not formed in either of the above systems. At pH=3, Cr(VI) does oxidize cyclohexane to cyclohexanol even in argon atmosphere.

Abstract

В реакции фотохимического оксигенирования циклогексана в системах KVO3−CF3COOH или K2Cr2O7−Bu4NBr−H2O−CH2Cl2 на воздухе источником кислородного атома в образующихся циклогексаноле и циклогексаноне является дикислород воздуха, а не оксокомплекс металла. В отсутствии дикислорода продукты оксигенирования алкана не образуются в обеих системах. Однако, при pH=3, Cr(VI) окисляет циклогексан до циклогексанола даже в атмосфере аргона.

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Authors and Affiliations

  1. Institute of Chemical Physics, 117977, Moscow, USSR

    G. B. Shul'pin & G. V. Nizova

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  1. G. B. Shul'pin
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  2. G. V. Nizova
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Shul'pin, G.B., Nizova, G.V. Contribution of air oxygen to photooxidation of alkanes by vanadium(V) and chromium(VI) oxocomplexes. React Kinet Catal Lett 45, 7–14 (1991). https://doi.org/10.1007/BF02078602

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  • DOI: https://doi.org/10.1007/BF02078602

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