Encapsulation Using the Intrazeolite Complexation Method

However, oxidation with H2O2 in acetone resulted in a high diol selectivity with an equilibrium mixture of the cis- and trans-diols, illustrating the role of the residual acidity of the support The reaction is suggested to occur via heterolyhc cleavage of the vanadium peroxo species. Less than 0.5% leaching of the bipy complex was observed over 50 h of operation. 

Transition Metal Single Site Catalysts-From Homogeneous to Immobilized Systems 

1 MPa O2). The role of the encapsulated [Co(salophen)] complexes is to catalyze the aerobic oxidation of hydroquinone to p-benzoquinone, which in turn oxidizes Pd(0). For the oxidation of 1,3-cyclohexadiene to l,4-diacetoxy-2-cyclohexene, the most active catalyst system involved the encapsulated complex [Co(tetra-tert-butyl-salophen)], which afforded product yields of 85-95% after 3 h at room temperature with greater than 90% trans-selectivity. This complex displayed significantly higher activity than the encapsulated [Co(salophen)] complex (72% yield in 3h) and the analogous homogeneous complex (86% yield in 5h). The increased activity of the t-butyl substituted catalyst was attributed to distortion of the bulky complex by the 

Encapsulation Using the intrazeolite Template Synthesis Method 

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