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Keywords:

  • carbon monoxide;
  • hydrogenation;
  • molten salts;
  • ruthenium;
  • salt effect
Thumbnail image of graphical abstract

A big promotion: One reason for the irreproducibility that is sometimes found in hydrogenation reactions of CO catalysed by [Ru3(CO)12] in molten [PBu4]Br is the possible presence of [HPBu3]Br, which acts as a promoter by providing a source of HBr.