ABSTRACT
Heterogeneous catalysts have several benefits such as high thermal and mechanical stability, wide applicability, and easy separation from the reaction mixture. There are some disadvantages of heterogeneous catalysts and severe reaction conditions such as high temperatures and pressures. On the other hand, the homogeneously catalyzed reactions are efficient, reproducible, and highly active. Their only major drawback is the problem of separating the catalyst from products for reactivation and reuse. Therefore, it is beneficial to combine the advantages of homogeneous catalysts with the ease of separation of heterogeneous catalysts. One approach to this is to anchor homogeneous catalysts to an inert support. The advantages resulting from the anchoring of transition metal complexes include introducing preferred orientations and stabilizing catalytically active sites. This results in a superior hybrid catalyst possessing advantageous features of homogeneous and heterogeneous catalysts while eliminating the disadvantages of both systems.
