REDUCIBILITY OF DIPHENYLPHOSPHINIC ACID

The phase homogeneity of diphenylphosphinic acid (С6H5)2PO2H purified by benzol or aqueous solution recrystallization is proved by X-ray powder diffraction analysis. The thermal behavior of the compound is studied by method of derivatography. The solubility of the compound in the multiple inorganic and organic solvents media is estimated. The results of experimental study of diphenylphosphinic acid decomposition in the reactions with oxidants of different chemical nature (nitric acid, permanganate, dichromate, vanadate, bismuthate, cerium (+4), hexacyanoferrate (+3), hydrogen peroxide, peroxydisulfate, hypochlorite, sodium benzenesulfonemonochloramide, bromate, periodate, iodate, manganese dioxide, lead dioxide) in aqueous media are given. Large amount of strong oxidant is required for breaking of both C–P chemical bonds in the molecule of diphenylphosphinic acid.