Abstract

The reactivity of Pd(II) complexes supported on carbon toward H2 was studied. For the carboxylate complexes Pd(RCOO)2 (R = Me, Me3C, F3C), it decreases upon decrease in the basicity of the acid RCO2H. The reactivity of Pd(II) η3-allyl complexes increases with increase in the Mulliken charges on the C atom of the allyl ligand connected to the substituent R. The results are in line with the heterocyclic mechanism of H-H bond activation in the hydrogen molecule and can be used for optimization of the composition of the initial compounds for the preparation of palladium catalysts.

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