Cycloaddition of carbon dioxide to propyne over supported Rh4 and Fe2Rh4 carbonyl cluster-derived catalysts
Abstract
Rh4 and Fe2Rh4 carbonyl cluster-derived catalysts supported on selected metal oxides such as TiO2, Al2O3, and ZrO2 exhibit catalytic activity in the formation of 4,6-dimethyl-2-pyrone by the cycloaddition of carbon dioxide to propyne under moderate conditions.