Atmospheric-Pressure Conversion of CO₂ to Cyclic Carbonates over Constrained Dinuclear Iron Catalysts.

ABSTRACT: The conversion of CO₂ and epoxides to cyclic carbonates over a silica-supported di-iron(III) complex having a reduced Robson macrocycle ligand system is shown to proceed at 1 atm and 80 °C, exclusively producing the cis-cyclohexene carbonate from cyclohexene oxide. We examine the effect of immobilization configuration to show that the complex grafted in a semirigid configuration catalytically outperforms the rigid, flexible configurations and even the homogeneous counterparts. Using the semirigid catalyst, we are able to obtain a TON of up to 800 and a TOF of up to 37 h^-1 under 1 atm CO₂. The catalyst is shown to be recyclable with only minor leaching and no change to product selectivity. We further examine a range of epoxides with varying electron-w

SUBMITTER: Pappuru S 

PROVIDER: S-EPMC9301958 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature