Chemical conversions of osmium (VI) sulfite complexes in ammonia–sulfate solutions |
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| Authors: | Z. S. Abisheva I. N. Parshina E. G. Bochevskaya V. Zh. Ushanov |
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| Affiliation: | aInstitute of Metallurgy and Ore Beneficiation, Almaty, Kazakhstan;bInstitute of Chemical Sciences, Almaty, Kazakhstan |
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| Abstract: | It has been found that osmium (VI) sulfite complexes having composition [OsO2(SO3)2(H2O)2]2− in ammonia and sulfuric acid solutions enter into reaction of intrasphere substitution resulting in the formation of new complexes of osmium (VI). The rate of their formation depends on the concentration of constituents in the system and the temperature of solutions. Water-soluble ammonia–sulfite complexes of osmium (VI) (final form is [OsO2(SO3)2(NH3)2]2−) are formed in ammonia-sulfate solutions. These complexes are converted into sulfate derivatives—water-soluble ([OsO2(SO3)(SO4)(NH3)2]2−) and insoluble ([OsO2(SO4)2(NH3)2]2−) in solutions containing (NH4)2SO4 and H2SO4. |
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| Keywords: | Osmium (VI) sulfite Ammonia– sulfate solutions Chemical conversions |
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