DIALKYL(ARYL)-CIS-2-(2-HYDROXYARYL)-2-ALKYL(ARYL)ETHENYLPHOSPHINE OXIDES AND METHOD OF OBTAINING THE

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FIELD : chemistry.SUBSTANCE : invention can be used for separating rare-earth and coloured metals and pertains to new phosphorous-containing complex-forming phosphine oxides with general formula (I) and methods of obtaining them : , where R1 = H, R2 = Ph, R3 = R4 = Ph, Me, Et, Pr, CH2Ph, 2-MeO-C6H4, C8H17; R1 = 4-Me, R2 = Ph, R3 = R4 = Ph, CH2Ph, 2-MeO-C6H4; R1 = H, R2 = 1-naphthyl, R3 = R4 = Ph, CH2Ph, 2-MeO-C6H4; R1=H, R2 = Bu, R3 = R4 = Ph; R1 = H, R2 = Ph, R3 = cyclo-C6H11, R4 = Et, Ph. The method of obtaining phosphine oxides (I) involves reaction in a medium of an organic solvent of chlorophosphorinine oxides with formula (II) with corresponding Grignard reagents, hydrolysis of the reaction mixture and separation of target compounds.EFFECT : obtaining new phosphorous-containing complex-forming compounds with formula (I).18 ex, 1 tbl