THE EFFECT OF PHOSPHONIUM SALT FORMATION ON THE KINETICS OF HOMOGENEOUS HYDROGENATIONS IN WATER UTILIZING A RHODIUM META-SULFONATOPHENYL-DIPHENYLPHOSPHINE COMPLEX
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Reaction of mono-sulfonated triphenylphosphine in water with certain activated olefins (for example maleic acid or fumaric acid) yields the corresponding phosphonium salt under very mild conditions. This interaction promotes the formation of the catalytically active species in the hydrogenation of the olefin catalyzed by the rhodium complex of the phosphine. 1993.