Abstract
The catalytic homogeneous oxidation of cyclododecane with hydrogen peroxide in the presence of tetrabutylammonium salts of iron-substituted Keggin-type polyoxotungstates of general formula (TBA)4 Hz XW11 Fe(H2 O)O39 ·nH2 O (where X = P, Si, B, and z = 0-2) is described. In the reaction conditions reported, the corresponding alcohol, ketone, and hydroperoxide are obtained as the main reaction products. The catalytic activity of the anions with phosphorous, silicon, and boron is compared in different reaction conditions. These catalytic oxidation reactions seem to be radical processes, since they are totally inhibited in the presence of I2 , a well-known radical scavenger.
Key words
iron - polyoxometalates - polyoxotungstates - oxidation - hydrogen peroxide - cyclododecane
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