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

Rhodium carbonyl complexes that formed from RhCl3. 4H(2)O and RhCl3. 4H(2)O modified by poly-N,N-dimethyl-N,N-diallylammonium chloride in a methanol-c hloroform medium in the hydroformylation of 1-hexene were studied by in sit u IR spectroscopy. Along with the rhodium hydrocarbonyl complexes, anionic complexes of the [Rh(CO)(2)Cl-2](-) 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 the polycation is the stabilization of the catalytically active mononuclear rh odium complexes.