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The production of cyclic carbonates from CO 2 cycloaddition to epoxides, using the C-scorpionate iron(II) complex [FeCl 2 {κ 3 -HC(pz) 3 }] (pz = 1 H -pyrazol-1-yl) as a catalyst, is achieved in excellent yields (up to 98%) in a tailor-made ionic liquid (IL) medium under mild conditions (80 °C; 1-8 bar). A favorable synergistic catalytic effect was found in the [FeCl 2 {κ 3 -HC(pz) 3 }]/IL system. Notably, in addition to exhibiting remarkable activity, the catalyst is stable during ten consecutive cycles, the first decrease (11%) on the cyclic carbonate yield being observed during the 11th cycle. The use of C-scorpionate complexes in ionic liquids to afford cyclic carbonates is presented herein for the first time.

Efficient and Reusable Iron Catalyst to Convert CO2 into Valuable Cyclic Carbonates