Extraction of heterometal ruthenium(II) complexes by diphenyl(dibutylcarbamoylmethyl)phosphine oxide from nitrate-nitrite solutions |
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| Authors: | V G Torgov R S Shul’man T V Us E S Stoyanov T M Korda V A Emel’yanov |
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| Institution: | (1) Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3, Novosibirsk, 630090, Russia;(2) Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 5, Novosibirsk, 630090, Russia |
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| Abstract: | The synergistic extraction of RuNO(NO2)4OH]2? by diphenyl(dibutylcarbamoylmethyl)phosphine oxide (L) in the presence of nonprecious metal cations (M2+) is studied; the extraction occurs on the account of the formation of heterometal complexes RuNO(NO2)4OHMLm] (M = Zn, Cu, Co, Ni) due to the addition of M2+ to ruthenium through the oxygen atoms of the OH and NO2 groups and the bidentate coordination of L to M2+. The extraction constants for Ru/M complexes and MLn(NO3)2 are determined. The variation in the extraction constants with changing M (Co, Zn, Cu > Ni) does not agree with the Irwing-Williams row, unlike the extraction with monodentate PO-containing extractants (Zn > Cu > Co > Ni). The feasibility of ruthenium extraction in the form of Ru/M complexes from complex nitrate-nitrite solutions is demonstrated. |
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