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The Catalytic Efficacy of Co(salen)(AL) in O2 Oxidation Reactions in CO2-Expanded Solvent Media: Axial Ligand Dependence and Substrate Selectivity

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Abstract

This work correlates the basicity of various axial ligands (AL), including triethylamine, methylimidazole, pyridine, acetonitrile or water, with the efficacy of catalytic oxidation of 2,6-di-tert-butylphenol by Co(salen)(AL) in CO2-expanded methylene chloride. Further, Co(salen)(AL)O2 abstracts hydrogen atoms from substrates of high to intermediate reactivity (BDECH ≤~90 kcal/mol).

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Acknowledgment

This research was supported with funds provided by the Center for Environmentally Beneficial Catalysis under the National Science Foundation Engineering Research Center Grant (EEC-0310689).

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Authors and Affiliations

  1. Department of Chemical Engineering, University of Kansas, Lawrence, KS, USA

    Bhuma Rajagopalan & Bala Subramaniam

  2. Department of Chemistry and Center for Environmentally Beneficial Catalysis, University of Kansas, Lawrence, KS, USA

    Hu Cai & Daryle H. Busch

Authors
  1. Bhuma Rajagopalan
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  2. Hu Cai
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  3. Daryle H. Busch
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  4. Bala Subramaniam
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Correspondence to Daryle H. Busch.

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Rajagopalan, B., Cai, H., Busch, D.H. et al. The Catalytic Efficacy of Co(salen)(AL) in O2 Oxidation Reactions in CO2-Expanded Solvent Media: Axial Ligand Dependence and Substrate Selectivity. Catal Lett 123, 46–50 (2008). https://doi.org/10.1007/s10562-007-9379-z

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  • DOI: https://doi.org/10.1007/s10562-007-9379-z

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