“Cation-cation” complexes of pentavalent actinides—I: Spectrophotometric study of complexes between neptunium (V) and UO22+ and NpO22+ ions in aqueous perchloric and nitric solutions

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Abstract

“Cation-cation” complexes Np(V)-Np(VI) and Np(V)-U(VI) have been studied in aqueous nitric and perchloric solutions by spectrophotometry and EPR. The formation of these complexes obeys the law of mass action, contrary to previous interpretations. These complexes are weak (K = 3.0 , σK% 5 for Np(V)-Np9VI); K = 3.7; σK% = 3 for Np(V)-U(VI) inperchloric medium) and slightly more stable in perchloric than in nitric media. These complexes are of the outer-sphere type. A critical discussion of the different interpretations is proposed.

References (23)

  • P. Gans et al.

    J. Inorg. Nucl. Chem.

    (1972)
  • J.C. Sullivan et al.

    J. Am. Chem. Soc.

    (1961)
  • T.W. Newton et al.

    Inorg. Chem.

    (1962)
  • G. Gordon

    Inorg. Chem.

    (1963)
  • A. Ekstrom et al.

    Inorg. Chem.

    (1972)
  • T.W. Newton et al.

    Inorg. Chem.

    (1965)
  • J.C. Sullivan

    J. Am. Chem. Soc.

    (1962)
  • J.C. Sullivan

    Inorg. Chem.

    (1964)
  • K. Murmann et al.

    Inorg. Chem.

    (1967)
  • A.A. Frolov et al.

    Radiokhimiya

    (1974)
  • A.G. Rykov et al.

    Radiokhimiya

    (1972)
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