Homogeneous catalytic hydrogenation of organic compounds using orthometallated schiff base complexes of palladium(II)

Abstract

The dinuclear orthometallated schiff base complexes of palladium(II) are efficient catalysts for dihydrogen reduction of organic - NO₂, > C = O, > C = C <, > C=N -, - N=N - and –C ≡ N groups under normal or high pressure conditions. The dependence of the catalytic activity on the nature of the bridging group and the schiff base ligands has been established. The experimental conditions control the nature and number of the reduction products in case of nitroaromatics. Reduction mechanism has been proposed on the basis of the nature of intermediate and final reduction products, change of physicochemical properties of the catalyst solutions, polarographic data of tbeligands and the complexes and the kinetic data.