期刊
CATALYSIS COMMUNICATIONS
卷 18, 期 -, 页码 165-167出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2011.11.036
关键词
Epoxide; Carbon dioxide; Cobalt; Cyclic carbonate; N,O-ligand
资金
- NSERC of Canada
- Canada Foundation for Innovation
- Province of Newfoundland and Labrador (RDC NL)
- Memorial University
Cobalt complexes of tetradentate amine-phenolate ligands were studied for their potential in coupling carbon dioxide with propylene oxide under neat reaction conditions. Cobalt(II) complexes afforded catalytic systems with higher TONs than analogous cobalt(III) compounds. Tetrabutylammonium bromide (TBAB) and PPN+N3- were effective co-catalysts whereas N,N-dimethylaminopyridine (DMAP) shut down reactivity. Ligands containing a pendant pyridyl donor afforded more active catalysts than those containing dimethylamine groups. Reactions proceeded well at room temperature under moderate pressures of carbon dioxide. (C) 2011 Elsevier B.V. All rights reserved.
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