Abstract
Radiopolarographic reduction of Ac(III) was investigated in aqueous solutions. It was found that a very large shift of the half-wave potential was induced by the addition of 1, 4, 7, 10, 13, 16-hexaoxacyclooctadecane (18-CROWN-6) to the aqueous solution. The shift was explained by complex formation of Ac(II) with 18-CROWN-6. The ionic radius and the electronic configuration of Ac2+ were determined to be 1.25 Å and [Rn] 6d1.
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Yamana, H., Mitsugashira, T., Shiokawa, Y. et al. Possibility of the existence of divalent actinium in aqueous solution. J. Radioanal. Chem. 76, 19–26 (1983). https://doi.org/10.1007/BF02519651
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DOI: https://doi.org/10.1007/BF02519651