A novel catalyst, RhH(CO)(P( p -CF 3 Ph) 3 ) 3, was synthesized for homogeneous catalytic hydroformylation of olefins in supercritical carbon dioxide. The incorporation of p -(trifluoromethyl) groups to the conventional hydroformylation catalyst, HRhCO(PPh 3 ) 3, provided enhanced solubility in supercritical carbon dioxide while maintaining catalyst activity and selectivity in the hydroformylation of 1-octene. The reaction rate showed a first-order dependency on the catalyst concentration. The total system pressure had no effect on either the reaction rate or selectivity. However, selectivity was found to depend on the catalyst concentration.
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Palo et al. (1999) studied this question.
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