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

Ana P C Ribeiro, Peter Goodrich, Luísa M D R S Martins

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Abstract

The production of cyclic carbonates from CO cycloaddition to epoxides, using the C-scorpionate iron(II) complex [FeCl {κ -HC(pz) }] (pz = 1 -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 {κ -HC(pz) }]/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.
Original languageEnglish
Article number1089
Number of pages10
JournalMolecules (Basel, Switzerland)
Volume26
Issue number4
DOIs
Publication statusPublished - 19 Feb 2021

Keywords

  • carbon dioxide conversion
  • cyclic carbonate
  • iron C-scorpionate
  • recyclable catalyst
  • synergistic catalysis

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