Journal
DALTON TRANSACTIONS
Volume 45, Issue 37, Pages 14658-14667Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6dt01069e
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Funding
- Ministerio de Economia y Competitividad [CTQ2013-43438-R]
- Departament d'Economia i Coneixement (Generalitat de Catalunya) [2014SGR670]
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A highly stable and easy to synthesize aluminium complex bearing a flexible N2O2-donor salabza ligand ( N,N'-bis(salicylene)-2-aminobenzylamine) in combination with tetrabutylammonium bromide forms an active binary catalytic system for the cycloaddition of CO2 to epoxides (TOFs 120-3434 h(-1)) under mild conditions (10 bar, 80 degrees C) and low catalyst loadings (0.05-0.2 mol%). Kinetic experiments have shown that the cycloaddition of CO2 to styrene oxide catalyzed by 1/TBAB is first order in 1, TBAB, CO2 and epoxide. A reaction mechanism is proposed based on these observations. Fe(III) and Co(III) related complexes are less active catalysts for this reaction.
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