Journal of Chemical Crystallography

, Volume 34, Issue 11, pp 807–811 | Cite as

Synthesis and structure of ditetrabutylammonium tetrachlorodioxoneptunium(VI)

  • Marianne P. Wilkerson
  • Harry J. Dewey
  • Pamela L. Gordon
  • Brian L. Scott


The reaction of a stock solution of NpO22 + in 2 M HCl with two equivalents of tetrabutylammonium chloride in 6 M HCl results in the preparation of the title compound. This compound, [NBu4]2[NpO2Cl4], is isostructural with the uranium analogue, [NBu4]2[UO2Cl4]. The anion of the complex, [NpO2Cl4]2−, adopts a pseudooctahedral geometry common to six-coordinate actinyl complexes in which the neptunium metal is coordinated by two trans axial oxo groups with Np―O(oxo) bond lengths of 1.733(5)Å, and four equatorial chloride ligands with Np–Cl bond lengths in the range 2.637(2)–2.676(2)Å. The neptunyl O―Np―O bond angle is 178.6(3)°. Charge balance of the neptunyl tetrachloride anion is maintained by two tetrabutylammonium cations. This complex crystallizes in the monoclinic space group P21/n (a = 15.416(4), b = 15.362(4), c = 18.479(5)Å, β = 108.147(6)°, V = 4158.4(19)Å3, Z = 4).

Crystal structure neptunium neptunyl tetrachloride 


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  1. Wilkerson, M. P.; Barefield, J. E.; Berg, J. M.; Dewey, H. J.; Hopkins, T. A. J. Nucl. Sci. Technol. 2002, (3), 129.Google Scholar
  2. Berg, J. M.; Sattelberger, A. P.; Morris, D. E.; Van Der Sluys, W. G.; Fleig, P. Inorg. Chem. 1993, 32, 647.Google Scholar
  3. Hopkins, T. A.; Berg, J. M.; Costa, D. A.; Smith, W. H.; Dewey, H. J. Inorg. Chem. 2001, 40, 1820.Google Scholar
  4. Sessler, J. L.; Gorden, A. E. V.; Seidel, D.; Hannah, S.; Lynch, V.; Gordon, P. L.; Donohoe, R. J.; Tait, C. D.; Keogh, D. W. Inorg. Chim. Acta. 2002, 341, 54.Google Scholar
  5. SMART-NT 4; Bruker AXS, Inc.: Madison, Wisconsin, 53719, 1996.Google Scholar
  6. SAINT-NT 5.050; Bruker AXS, Inc.: Madison, Wisconsin 53719, 1998.Google Scholar
  7. SADABS, first release; George Sheldrick, University of Göttingen: Germany.Google Scholar
  8. SHELXTL NT Version 5.10; Bruker AXS, Inc.: Madison, Wisconsin, 53719, 1997.Google Scholar
  9. Di Sipio, L.; Tondello, E.; Pelizzi, G.; Ingeltto, G.; Montenero, A. Cryst. Struct. Commun. 1974, 3, 527.Google Scholar
  10. Bean, A. C.; Scott. B. L.; Albrecht-Schmitt, T. E.; Runde. W. Inorg. Chem. 2003, 42, 5632.Google Scholar
  11. Budantseva, N. A.; Andreev, G. B.; Fedoseev, A. M.; Antipin, M. Yu. Russ. J. Coord. Chem. (Engl. Transl.) 2003, 29, 653.Google Scholar
  12. Fedosseev, A. M.; Budantseva, N. A.; Grigoriev, M. S.; Guerman, K. E.; Krupa, J. C. Radiochim. Acta 2003, 91, 147.Google Scholar
  13. Charushnikova, I. A.; Starikova, Z. A.; Fedoseev, A. M.; Budantseva, N. A. Russ. J. Inorg. Chem. (Engl. Transl.) 2000, 45, 1827.Google Scholar
  14. Chuguryan, D. G.; Dzyubenko, V. I.; Grigor’ev, M. S.; Yanovskii, A. I.; Struchkov, Yu. T. Radiokyimiya (Eng. Transl.) 1988, 30, 39.Google Scholar
  15. Alcock, N. W.; Flanders, D. J.; Pennington, M.; Brown, D. Acta Crysallogr., Sect. C 1987, 43, 1476.Google Scholar
  16. Alcock, N. W.; Flanders, D. J.; Brown, D. J. Chem. Soc. Dalton Trans. 1985, 1001.Google Scholar
  17. Alcock, N. W.; Roberts, M. M.; Brown, D. J. Chem. Soc., Dalton Trans. 1982, 25.Google Scholar
  18. Alcock, N. W.; Roberts, M. M.; Brown, D. J. Chem. Soc., Dalton Trans. 1982, 33.Google Scholar
  19. Wilkerson, M. P.; Berg, J. M.; Dewey, H. J.; Hopkins, T. A. (in preparation).Google Scholar
  20. Pauling, L. The Nature of the Chemical Bond, 3rd ed.; Cornell University Press: Ithaca, NY, 1960.Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2004

Authors and Affiliations

  • Marianne P. Wilkerson
    • 1
  • Harry J. Dewey
    • 1
  • Pamela L. Gordon
    • 1
  • Brian L. Scott
    • 1
  1. 1.Los Alamos National LaboratoryChemistry DivisionLos AlamosUSA

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