Efficient and Reusable Iron Catalyst to Convert CO2 into Valuable Cyclic Carbonates |
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| Authors: | Ana P. C. Ribeiro,Peter Goodrich,Luí sa M. D. R. S. Martins |
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| Affiliation: | 1.Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2.School of Chemistry and Chemical Engineering, Queen’s University Belfast David Keir Building, Stranmillis Road, Belfast, Northern Ireland BT9 5AG, UK; |
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| Abstract: | ![]()
The production of cyclic carbonates from CO2 cycloaddition to epoxides, using the C-scorpionate iron(II) complex [FeCl2{κ3-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 °C; 1–8 bar). A favorable synergistic catalytic effect was found in the [FeCl2{κ3-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. |
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| Keywords: | carbon dioxide conversion cyclic carbonate recyclable catalyst iron C-scorpionate synergistic catalysis |
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