Transformation of rhodium carbonyl complexes in hydroformylation of 1-hexene studied from in situ IR spectroscopic data

Article abstract of DOI:10.1007/BF02496251

Rhodium carbonyl complexes that formed from RhCl₃ · 4H₂O and RhCl₃ · 4H₂O modified by poly-N,N-dimethyl-N,N-diallylammonium chloride in a methanol - chloroform medium in the hydroformylation of 1-hexene were studied by in situ IR spectroscopy. Along with the rhodium hydrocarbonyl complexes, anionic complexes of the [Rh(CO)₂Cl₂]^- type, whose concentrations and rates of formation in an acidic medium are much higher than those in a basic medium, were shown to be the active centers of hydroformylation. The function of the polycation is the stabilization of the catalytically active mononuclear rhodium complexes.