227953-99-3Relevant academic research and scientific papers
High-pressure infrared studies of rhodium complexes containing thiolate bridge ligands under hydroformylation conditions
Diéguez, Montserrat,Claver, Carmen,Masdeu-Bultó, Anna M.,Ruiz, Aurora,Van Leeuwen, Piet W. N. M.,Schoemaker, Gerard C.
, p. 2107 - 2115 (2008/10/08)
In situ high-pressure IR spectroscopy studies of the rhodium catalyst systems [Rh2{μ-S(CH2)3N(Me2)} 2(COD)2]/PR3 (R = Ph, OPh), [Rh2{μ-S(CH2)2S}(COD)2]/PPh 3, [Rh2{μ-S(CH2)4S}-(COD)2] 2/PPh3, [Rh2{μ-XANTOSS}(COD)2]2/PPh3, and [Rh(acac)(CO)2]/PR3 (R = Ph, OPh) revealed the presence of mononuclear rhodium hydride species under hydroformylation conditions (80°C, 5-30 bar). The activities and selectivities, obtained during the hydroformylation of 1-hexene using these systems as catalyst precursors, can be fully accounted for by the mononuclear species observed. Deuterioformylation experiments using dinuclear [Rh2{μ-S(CH2)3N(Me2)} 2(COD)2]/PR3 systems lent no support to a dinuclear mechanism.
