Abstract
<jats:p>The study is aimed at obtaining tri-para-tolylantimony oxide, which is an analog of Ph3SbO, a well-known and widely used catalyst for various synthesis processes of organic, macromolecular compounds. Tri-para-tolylantimony oxide, isolated in solid form after the alkaline hydrolysis reaction of p-Tol3Sb(OAc)2 in chloroform, or the oxidation reaction of p-Tol3Sb with tert-butyl hydroperoxide in THF, is a mixture of three different forms that differ in the position of proton signals of the para-tolyl groups. Tri-para-tolylantimony oxide obtained by the oxidation reaction of p-Tol3Sb with tert-butyl hydroperoxide in CDCl3 is a mixture of the first two, then three of the same forms, depending on time. The ratio of different forms of p-Tol3SbO depends on synthesis conditions. Heating p-Tol3SbO at 120 °C leads to redistribution of the form ratio towards more stable forms. An increase in temperature up to 200 °C leads to destruction of p-Tol3SbO. The effect of dichloroacetic acid on the resulting p-Tol3SbO at room temperature leads to p-Tol3Sb(O2CCHCl2)2, and activity of three forms differs. Alkaline hydrolysis of Mes3SbCl2 at room temperature leads to formation of Mes3Sb(OH)2, which is acylated to Mes3Sb(OAc)2, when heated with acetic acid, through the intermediate formation of Mes3Sb(OH)(OAc).</jats:p>