Transformation of carbon dioxide into valuable chemicals over bifunctional metallosalen catalysts bearing quaternary phosphonium salts

摘要: Abstract The chemical transformation of CO2 under mild conditions remains a great challenge because its exceptional kinetic and thermodynamic stability. Two important reactions in the are N-formylation reaction amines using hydrosilanes CO2, cycloaddition to epoxides. Here, we report high efficiency bifunctional metallosalen complexes bearing quaternary phosphonium salts catalyzing both these solvent-free, without need for co-catalysts. catalysts' bifunctionality is attributed an intramolecular cooperative process between metal center halogen anion. Depending on reaction, this activates by permitting either synergistic activation Si–H bond via metal–hydrogen coordinative (M–H) or dual epoxide metal–oxygen (M–O). one-component catalysts also shown be easily recovered reused five times significant loss activity selectivity. current results combined with previous work area propose relevant mechanisms.