Modification of catalytic activity of complexes of Fe(II,III) acetylacetonates with quaternary ammonium salts in the ethylbenzene oxidation with molecular O2 in the presence of small amounts of H2O

The catalytic effects of small amounts of H2O (similar to 10(-3) mol/l), introduced in the ethylbenzene oxidation with molecular O-2 catalysed with {Fe(III)(acac)(3) + R4NBr} systems, where R4NBr = exo ligands-modifiers, quaternary ammonium salts CTAB, (C2H5)(4)NBr, Me4NBr, were discovered by us. The synergetic effects of increase in the selectivity (S-PEH) and the conversion degree (C) (parameter (S) over tilde .C) of ethylbenzene oxidation with molecular O-2 to a-phenylethylhydroperoxide (PEH) were obtained in the case of ethylbenzene oxidation catalysed with {Fe(III)(acac)(3) + CTAB+ H2O} system. The proposed 'dioxygenase-like' mechanism of iron catalyst transformation into new catalytic particles in the course of oxidation process in the presence {Fe(III)(acac)(3)(+) R4NBr} and activating additives of the water is discussed. The method of evaluation of the activity of formed complexes (Fe(II)(acac)(2))(x)(R4NBr)(y)(H2O)(n) in the micro-stages of the catalytic chain-radical ethylbenzene oxidations is offered.