Phosphonium monodentate

Another example of the use of metal complexes in ionic liquids was reported by Moores and co-workers. In this case, besides the use of [P4 4 4 i4]NTf2 as the solvent, different diphenylphosphino functionalised phosphonium salts (Fig. 3) acted as monodentate ligand for Rh complexes. These PFILs-Rh(I) complexes displayed very good activities and excellent selectivities in hydroformylation reactions. 

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