A nona-vacant Keggin-type tricarbonyl rhenium derivative {[PMo3O16][Re(CO)3]4}5− and its catalytic performance for CO2 cycloaddition reactions†
Abstract
A nona-vacant Keggin-type tricarbonyl rhenium derivative [(NH4)5]{[PMo3O16][Re(CO)3]4}·1.5H2O was obtained and characterized. Its frontier orbitals were computed by density functional theory (DFT) calculations. Furthermore, it could act as a Lewis acid catalyst and promote the conversion of CO2 to cyclic carbonate under mild reaction conditions with pyrrolidinium bromide as a co-catalyst.