Abstract
1. We have studied the catalytic activity of Cu(II) complexes with anion-exchange resin AN-251 in the liquid-phase oxidation of cumene. We have demonstrated by the spin-trap method that the process takes place by a radical-chain homogeneous-heterogeneous mechanism and simultaneously by a molecular mechanism. 2. We have examined the structure of the Cu(II) complexes with AN-251 by EPE and IR spectroscopy and shown that the catalyst undergoes deep-seated changes in the course of the catalytic oxidation of cumene; in particular, the methyl groups of the 2-methyl-5-vinylpyridine branches of the ion-exchange resin are oxidized to form fragments ofα-picolinic acid, and the coordination sphere of the copper(II) ions is changed.
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