SOLVENT-EXTRACTION OF TETRACHLORONITRIDOTECHNETATE(VI) ION WITH TETRAPHENYLARSONIUM CHLORIDE

Radiochemical and spectrophotometric studies on the solvent extraction of tetrachloronitridotechnetate(VI) ion with tetraphenylarsonium chlo ride into chloroform have been reported. Analysis of the dependence of the distribution ratio for technetium species on the concentration of hydrogen ion (0.1-1.0M) revealed that an equilibrium between tetrachl oronitridotechnetate(VI) ion and [(H2O)Cl3NTc-O-TcNCl3(H2O)](2-) is es tablished in the aqueous phase. However, formation of di(mu-O) dimer w as suggested, when the concentration of hydrochloric acid is less than 0.2M. The extraction constant for technetium and formation constant f or mu-oxo technetium nitrido complex were evaluated.