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- Title
Unprecedented Carbonato Intermediates in Cyclic Carbonate Synthesis Catalysed by Bimetallic Aluminium(Salen) Complexes.
- Authors
Castro‐Osma, José A.; North, Michael; Offermans, Willem K.; Leitner, Walter; Müller, Thomas E.
- Abstract
The mechanism by which [Al(salen)]2O complexes catalyse the synthesis of cyclic carbonates from epoxides and carbon dioxide in the absence of a halide cocatalyst has been investigated. Density functional theory (DFT) studies, mass spectrometry and 1H NMR, 13C NMR and infrared spectroscopies provide evidence for the formation of an unprecedented carbonato bridged bimetallic aluminium complex which is shown to be a key intermediate for the halide-free synthesis of cyclic carbonates from epoxides and carbon dioxide. Deuterated and enantiomerically-pure epoxides were used to study the reaction pathway. Based on the experimental and theoretical results, a catalytic cycle is proposed.
- Subjects
CARBONATE synthesis; BIMETALLIC catalysts; EPOXY compounds; HALIDES; DENSITY functional theory
- Publication
ChemSusChem, 2016, Vol 9, Issue 8, p791
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.201501664