Coupling of carbon dioxide with neat propylene oxide catalyzed by aminebisphenolato cobalt(II)/(III) complexes and ionic co-catalysts
作者： Lisa N. Saunders , Nduka Ikpo , Chad F. Petten , Uttam Kumar Das , Louise N. Dawe
DOI: 10.1016/J.CATCOM.2011.11.036
关键词: Epoxide 、 Cobalt 、 Chemistry 、 Inorganic chemistry 、 Carbon dioxide 、 Polymer chemistry 、 Reactivity (chemistry) 、 Dimethylamine 、 Ionic bonding 、 Propylene oxide 、 Catalysis
摘要: 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) afforded catalytic systems higher TONs than analogous cobalt(III) compounds. Tetrabutylammonium bromide (TBAB) and PPN+N3- effective co-catalysts whereas N,N-dimethylaminopyridine (DMAP) shut down reactivity. Ligands containing a pendant pyridyl donor more active catalysts those dimethylamine groups. Reactions proceeded well at room temperature moderate pressures of carbon dioxide.
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