Formation and Nature of Microheterogeneous Catalysts
Based on Palladium Complexes¹

F. K. Shmidt, L. B. Belykh, and T. V. Cherenkova

Irkutsk State University, Irkutsk, 664033 Russia

Received July 21, 2000

Abstract—The mechanism of the formation and the nature of microheterogeneous catalysts for hydrogenation
are discussed using acetylacetonate complexes of palladium with phosphine ligands as an example. Polynuclear
palladium complexes with phosphide and phosphinidene ligands are obtained, and their role in the formation
of hydrogenation catalysts is found. As distinct from phosphide complexes, amide complexes of palladium are
unstable in a hydrogen atmosphere and undergo reduction to form highly dispersed palladium black.

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