Abstract
The kinetics and mechanism of the oxidative addition of CH 3I to [Rh(acac)(CO)(PX 3)], where X = p-chlorophenyl, phenyl and p-methoxyphenyl, were studied with the aid of IR and visible spectrophotometry in 1,2-dichloroethane. The reaction proceeds through an initial ionic intermediate followed by two consecutive equilibrium steps, the first involving acetyl formation followed by acyl → alkyl rearrangement to give [Rh(acac)(CO)(CH 3)- (I)(PX 3)] as final product. Equilibrium and rate constants are correlated with phosphine basicity.
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