872611-84-2Relevant academic research and scientific papers
Anion effects in the formation of the active catalyst in the Ruhrchemie - Rhone-Poulenc aqueous biphasic hydroformylation process. Are there any?
Kovacs, Jozsef,Joo, Ferenc,Frohning, Carl D.
, p. 1033 - 1036 (2005)
The water soluble [Rh(OAc)(CO)(mtppms)2] containing monosulfonated triphenylphosphine ligands was prepared for the first time and its hydrogenation was studied in aqueous solutions. In the presence of additional mtppms, the reaction yielded [RhH(CO)(mtppms)3], a close analogue of [RhH(CO)(mtppts)3], the immediate catalyst precursor in the Ruhrchemie - Rhone-Poulenc aqueous biphasic hydroformylation process. The extent of the [Rh(OAc)(CO)(mtppms)2] → [RhH(CO)(mtppms) 3] transformation strongly depended on the solution pH, similar to the case of the hydrogenation of [RhCl(CO)(mtppms)2] studied earlier. In this respect, RhCl3·aq and Rh(OAc)3·aq can be used equally well for the in situ preformation of [RhH(CO)(mtppts) 3], although the latter is the preferred choice in the industrial process.
