ABSTRACT
This chapter compares the effectiveness of two conventional methods of stimulation of reactions with participation of immobilized complexes, photoactivation and electrochemical stimulation. Formation of the catalyst proceeds by reductive decomposition during the activation step, isocyanide hydrogenation, splitting the rhodium-acetylacetonate bond, and forming small metallic clusters (dimensions 1.6-7.2 nm). Electrochemical oxidation with participation of immobilized complexes is no less widespread than hydrogenation, for instance electrooxidation of carbinol, epoxidation of cw-cyclooctadiene by molecular oxygen on an electrode modified by poly(pyrrole-manganese-porphyrin). The chapter shows that immobilized metal complexes can be used as catalysts for diverse catalytic processes. These can be applied to the large-scale production of a number of valuable products, many technological stages being improved substantially. Asymmetric hydroformylation and hydrolysis with the participation of immobilized chiral complexes shows the possibility of generation of a large quantity of stereoasymmetric products from small quantities of chiral material (under optimal conditions the optical excess reaches 55–70%).
