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Keywords:

  • carbon dioxide;
  • homogeneous catalysis;
  • niobium;
  • propylene carbonates;
  • renewable resources
Thumbnail image of graphical abstract

Like a sore thumb: Niobium stands out among neighboring transition metals for its catalytic performance in the synthesis of cyclic carbonates. Readily available NbCl5 is a very efficient catalyst for the preparation of industrially relevant carbonates at ambient temperature, low CO2 pressure, and low concentrations. DMAP=N,N-dimethylaminopyridine.