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Highly Active Aluminium Catalysts for the Formation of Organic Carbonates from CO2 and Oxiranes

Authors

  • Dr. Christopher J. Whiteoak,

    1. Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain), Fax: (+34) 977-920-828
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  • Dr. Nicola Kielland,

    1. Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain), Fax: (+34) 977-920-828
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  • Victor Laserna,

    1. Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain), Fax: (+34) 977-920-828
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  • Fernando Castro-Gómez,

    1. Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain), Fax: (+34) 977-920-828
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  • Dr. Eddy Martin,

    1. Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain), Fax: (+34) 977-920-828
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  • Eduardo C. Escudero-Adán,

    1. Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain), Fax: (+34) 977-920-828
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  • Prof. Dr. Carles Bo,

    1. Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain), Fax: (+34) 977-920-828
    2. Departament de Química Física i Inorgánica, Universitat Rovira i Virgili, Marcel⋅lí Domingo s/n 43007 Tarragona (Spain)
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  • Prof. Dr. Arjan W. Kleij

    Corresponding author
    1. Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain), Fax: (+34) 977-920-828
    2. Catalan Institute of Research and Advanced Studies (ICREA), Pg. Lluís Companys 23, 08010 Barcelona (Spain)
    • Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain), Fax: (+34) 977-920-828

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Abstract

AlIII complexes of amino-tris(phenolate) ligand scaffolds have been prepared to attain highly Lewis acidic catalysts. Combination of the aforementioned systems with ammonium halides provides highly active catalysts for the synthesis of organic carbonates through addition of carbon dioxide to oxiranes with initial turnover frequencies among the highest reported to date within the context of cyclic carbonate formation. Density functional theory (DFT) studies combined with kinetic data provides a rational for the relative high activity found for these AlIII complexes, and the data are consistent with a monometallic mechanism. The activity and versatility of these AlIII complexes has also been evaluated against some state-of-the-art catalysts and the combined results compare favorably in terms of catalyst construction, stability, activity, and applicability.

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