Aluminium‐Mediated Carbon Dioxide Reduction by an Isolated Monoalumoxane Anion

Abstract

The deoxygenative conversion of carbon dioxide to carbon monoxide is promoted by the aluminyl anion [Al(NON^Ar )]^- (NON^Ar =[O(SiMe₂ NAr)₂ ]^2- , Ar=2,6-iPr₂ C₆ H₃ ). The reaction proceeds via the isolable monoalumoxane anion [Al(NON^Ar )(O)]^- , containing a terminal aluminum-oxygen bond. This species reacts with a second equivalent of carbon dioxide to afford the carbonate [Al(NON^Ar )(CO₃ )]^- , and with nitrous oxide to generate the hyponitrite anion, [Al(NON^Ar )(κ² O,O'-N₂ O₂ )]^- .