FORMATION OF ANIONIC CARBONYLRHODIUM COMPLEXES FROM WILKINSONS COMPLEX UNDER CONDITIONS OF HYDROFORMYLATION OF FORMALDEHYDE

The compositions and the dynamics of transformations of carbonylrhodiu m complexes formed from Wilkinson's complex, RhCl(PPh(3))(3), dissolve d in mesitylene-N, N-dimethylacetamide (DMAA) mixtures in which the DM AA concentration varied from 0 to 100%, in an atmosphere of synthesis gas (P-CO+H2 = 6 MPa, T = 373 K) were investigated in situ by IR spect roscopy. The anion complexes, [Rh(CO)(2)(PPh(3))(x)(DMAA)(y)](-)(x = 1 , 2; y = 1, 0) and [Rh(CO)(4)](-), which are the centers of formaldehy de hydroformylation, are produced in noticeable quantities when 100% D MAA is used as a solvent, Separate steps of the formation of anionic c omplexes from RhCl(PPh(3))3 have been identified. Under the conditions of hydroformylation of formaldehyde, CH2O participates in the formati on of the anionic complexes, along with DMAA.