Abstract
Palladium-lanthanoid bimetallic complex catalysts supported on chloromethylated polystyrene beads derivatized with anthranilic acid have been synthesized. Their characterization and catalytic activity have been studied. Under mild conditions, the polymer-bound Pd-La complex catalyzed the hydrogenation of olefins. The hydrogenation rate was correlated with the solubility parameter, δ, of the solvents and substrates. The rates of hydrogenation of octene were studied and the dependence of factors such as catalyst concentration, octene concentration, hydrogen pressure and temperature has been determined. The rate equation for the hydrogenation of octene in ethyl acetate solvent was found to be R = kP H 2 C Cat . The activation energy of this reaction was 3.0 kcal/mol. It was also found that the promotion effect by anchored Ln ions varied with the atomic number of the Ln series. When the f electron number was 0, 7 or 14, the polymer-bound Pd-Ln catalyst possessed the highest activity in hydrogenation.
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