Higher TRPTC

The concept of TRPTC provides a reasonable explanation for the satisfactory catalytic reactivity of Rh/nonionic phosphine complexes in the case of the two-phase hydroformylation of higher olefins. At a temperature lower than the cloud point, a nonionic phosphine-modified rhodium catalyst would remain in the aqueous phase since the partition of the catalyst between water and a nonpolar aprotic organic solvent strongly favors the aqueous phase. On heating to a temperature higher than the cloud point, however, the catalyst loses its hydrate shell, transfers into the organic phase and then catalyzes the transformation of alkenes to aide-... 

TRPTC system based on the Cp of TRLs has been proposed [13]. The general principle of TRPTC is depicted in Figure 2. The TRPTC process can be described as follows at a temperature lower than the cloud point, the catalyst is soluble in the aqueous phase. On heating to a temjjerature higher than the cloud point, however, the catalyst transfers from the aqueous phase into the organic phase. Thus, the catalyst and the substrate are in the same phase and the reaction proceeds in the... 

TRPTC has already been applied successfully in the hydroformylation of higher olefins and the CO selective reduction of nitroarenes, both on a laboratory scale. 

Indeed, high activity was obtained in the biphasic hydroformylation of higher olefins in the presence of Rh/PETPP complexes as catalysts, which demonstrated that the water solubility of the substrate did not influence the effectiveness of the TRPTC system. Some TRPT catalysts such as PETPPs 17, P-N bidentate (PEDPA... 

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