Abstract

The addition of a small amount of a di- or tritertiaryphosphine to a solution of [RhH(CO) (PPh 3) 3] in benzene enhances the hydroformylation activity and selectivity of the system, but addition of an amount exceeding equimolar reduces the activity of the system. Equilibrium mixtures of terti- aryphosphine—rhodium complexes, with different degrees of substitution, of different catalytic activity are postulated to explain these observations.

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