| Abstract |
The production of cyclic carbonates from CO2 cycloaddition to epoxides, using the C-scorpionate iron(II) complex [FeCl2\kappa(3)-HC(pz)(3)\] (pz = 1H-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 degrees C; 1-8 bar). A favorable synergistic catalytic effect was found in the [FeCl2\kappa(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. |
