Highly Active Aluminium Catalysts for the Formation of Organic Carbonates from CO2 and Oxiranes |
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| Authors: | Dr Christopher J Whiteoak Dr Nicola Kielland Victor Laserna Fernando Castro‐Gómez Dr Eddy Martin Eduardo C Escudero‐Adán Prof?Dr Carles Bo Prof?Dr Arjan W Kleij |
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| Affiliation: | 1. Institute of Chemical Research of Catalonia (ICIQ), Av. Pa?sos 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);3. Catalan Institute of Research and Advanced Studies (ICREA), Pg. Lluís Companys 23, 08010 Barcelona (Spain) |
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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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| Keywords: | aluminium carbon dioxide carbonates homogeneous catalysis ligands |
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