Advertisement

N,N-Dimethylacetamide (DMA) Complexes of Uranium (IV) Mixed Halides

  • K. W. Bagnall
Conference paper

Abstract

The uranium tetrachloride-DMA complex, 2 UCl4.5 DMA, and the corresponding neptunium (IV) and plutonium (IV) complexes have been known for some years (1) but, apart from the probable presence of one or more bridging DMA molecules in the compounds, no data on their constitution are available. Although they are essentially non-electrolytes in organic solvents such as DMA, methyl cyanide or nitromethane, the chloride ion can be completely replaced by nitrate using the silver salt (2), thiocyanate with the potassium salt (3) or Perchlorate, again with the silver salt (4), the resulting compounds having the compositions [U(NO3)4]2(DMA)5 , U(SCN)4(DMA)4 and U(C10) (DMA) . The first two of these are non-electrolytes and the third is, as would be expected, a 4:1 electrolyte in nitromethane (5). The chloride ion can also be replaced by iodide on treatment of the chloride complex with a large excess of sodium iodide in non-aqueous solvents, but this does not go to completion in organic solvents at room temperature, unlike the other replacement reactions. With DMA as solvent, the product of the reaction is the pale green complex UI2 Cl2(DMA)5 even at 100° (5). This compound is precipitated from solution in DMA by ethyl acetate, in which the excess of sodium iodide and any uranyl halide formed by atmospheric oxidation are both soluble.

Keywords

Molar Conductivity Chloride Complex Silver Salt DIMETHYLACET Amide Sodium Iodide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    BAGNALL, K.W., DEANE, A.M., MARKIN, T.L., ROBINSON, P.S., and STEWART, M.A.A., J.Chem.Soc. (London), 1961, 1611.Google Scholar
  2. 2.
    BAGNALL, K.W., ROBINSON, P.S., and STEWART, M.A.A., J.Chem. Soc. (London), 1961, 4060.Google Scholar
  3. 3.
    BAGNALL, K.W., BROWN, D., and COLTON, R., J.Chem.Soc. (London), (to be published).Google Scholar
  4. 4.
    BAGNALL, K.W., BROWN, D., and DEANE, A.M., J.Chem.Soc. (London), 1962, 1655.Google Scholar
  5. 5.
    BAGNALL, K.W., BROWN, D. du PREEZ, J.G.H., and JONES, P.J., J.Chem.Soc. (London) (to be published).Google Scholar
  6. 6.
    MARKOV, V.P., and TRAGGEIM, E.N., Zhur.Neorg.Khim., 6, 2316 (1961).Google Scholar
  7. 7.
    BAGNALL, K.W., BROWN, D., JONES, P.J., and du PREEZ, J.G.H., J.Chem.Soc. (London) (to be published).Google Scholar

Copyright information

© Springer-Verlag Wien 1964

Authors and Affiliations

  • K. W. Bagnall
    • 1
  1. 1.Chemistry DivisionAERE HarwellDidcot/BerksUK

Personalised recommendations