HYDROGENATION CATALYSTS BASED ON PALLADIUM COMPLEXES WITH POLY(VINYLPYRIDINE)

The conditions for the preparation of catalysts based on the interacti on of PdCl2 with poly(vinylpyridine) were studied. The activity of pol ymer-metal complexes in hydrogenation can be considerably changed by v ariation in temperature, initial ratio of PdCl2 and polymer in solutio n, and contact time of the resulting complexes with the initial soluti on. The complex, prepared at 25-degrees-C from ethanolic solutions of poly(2-vinylpyridine) and PdCl2 (molar ratio polymer: Pd = 1:1), and k ept in the initial solution for 3 days, was found to be an active cata lyst for hydrogenation. The reduction of this complex with NaBH4 leads to an increase in its catalytic activity.