STUDY OF HYDROFORMYLATION OF FORMALDEHYDE IN THE PRESENCE OF RHODIUM CATALYSTS BY IN-SITU IR SPECTROSCOPY AND THE KINETIC TECHNIQUE

Carbonylrhodium complexes formed during hydroformylation of CH2O from various rhodium precursors were investigated by in situ IR spectroscop y. It was found that under the conditions of the hydroformylation of C H2O in N,N-dimethylacetamide (DMAA), RhH(CO)(PPh(3))(3), RhCl(CO)(PPh( 3))(2), RhCl(PPh(3))(3), RhCl(CO)(PBu(3))(2), and [RhCl(CO)(2)](2) for m complex systems that necessarily contain anionic complexes, [Rh(CO)( 2)L(x)(DMAA)(y)](-) (L = PPh(3), PBu(3), x = 1 to 2, y = 1 to 0; [Rh(C O)(4)](-)). The participation of ionic structures in the hydroformylat ion of CH2O, most likely, in the step of the activation of CH2O, was p roven by kinetic techniques.