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DOI: 10.1039/A608620I (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1997, 2241-2248

Eight-co-ordination in lanthanide pyrazolylborate chemistry: crystal structures of [LaTpMe,Me2(MeCN)(O3SCF3)] ·MeCN, [NdTpMe,Me2(MeCN)2][O3SCF 3] and [LaTpMe,Me2(NO3)]·MeCN [TpMe,Me = tris(3,5-dimethylpyrazolyl) hydroborate]

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Robin J. H. Clark, Sung Ying Liu, Graham H. Maunder, Andrea Sella and Mark R. J. Elsegood

Abstract

The reaction of [LnTpMe,Me2][O3SCF3] [Ln = La, Ce, Pr or Nd; TpMe,Me = tris(3,5-dimethylpyrazolyl) hydroborate] in toluene with acetonitrile gave complexes of stoichiometry LnTpMe,Me2(MeCN)2(O3SCF 3) (Ln = La, Ce, Pr or Nd). The structures of those of La and Nd have been determined by X-ray crystallography and found to be ionization isomers of each other: [LaTpMe,Me2(MeCN)(O3SCF3)] ·MeCN consists of neutral molecules while [NdTpMe,Me2(MeCN)2][O3SCF 3] adopts an ionic structure. The structure of [LaTpMe,Me2(NO3)] has been determined for comparison. The co-ordination environment of the metal centres in all three complexes was shown by polytopal analysis to be dodecahedral in contrast to that (square antiprismatic) commonly adopted by complexes involving unsubstituted hydrotris(pyrazolyl)borate.

References

  1. T. Imamoto, Lanthanides in Organic Synthesis, Academic Press, London, 1994 Search PubMed.
  2. I. Santos and N. Marques, New J. Chem., 1995, 19, 551 Search PubMed.
  3. K. W. Bagnall, A. C. Tempest, J. Takats and A. P. Masino, Inorg. Nucl. Chem. Lett., 1976, 12, 555 Search PubMed.
  4. M. A. J. Moss and C. J. Jones, Polyhedron, 1990, 9, 697 CrossRef CAS.
  5. M. G. B. Drew, Coord. Chem. Rev., 1977, 24, 179 CrossRef CAS.
  6. S. Y. Liu, G. H. Maunder, A. Sella, M. Stevenson and D. A. Tocher, Inorg. Chem., 1996, 35, 76 CrossRef CAS.
  7. M. A. Moss, C. J. Jones and A. J. Edwards, J. Chem. Soc., Dalton Trans., 1989, 1393 RSC.
  8. J. Takats, X. W. Zhang, V. W. Day and T. A. Eberspacher, Organometallics, 1993, 12, 4286 CrossRef CAS.
  9. X. W. Zhang, G. R. Loppnow, R. MacDonald and J. Takats, J. Am. Chem. Soc., 1995, 117, 7828 CrossRef CAS.
  10. G. H. Maunder and A. Sella, unpublished work.
  11. P. H. Smith and K. N. Raymond, Inorg. Chem., 1985, 24, 3469 CrossRef CAS.
  12. G. H. Maunder, A. Sella and D. A. Tocher, J. Chem. Soc., Chem. Commun., 1994, 558 Search PubMed; G. H. Maunder, Ph.D. Thesis, University College London, 1996.
  13. Y. Sun, R. McDonald, J. Takats, V. W. Day and T. A. Eberspacher, Inorg. Chem., 1994, 33, 4433 CrossRef CAS.
  14. R. G. Lawrence, C. J. Jones and R. A. Kresinski, J. Chem. Soc., Dalton Trans., 1996, 501 RSC.
  15. D. L. Reger, S. J. Knox, J. A. Lindeman and L. Lebioda, Inorg. Chem., 1990, 29, 416 CrossRef CAS.
  16. S. McNally and N. J. Cooper, ACS Symp. Ser., 1987, 357.
  17. D. F. Shriver and M. A. Drezdzon, The Manipulation of Air-Sensitive Compounds, Wiley, New York, 2nd edn., 1986 Search PubMed.
  18. S. Trofimenko, J. Am. Chem. Soc., 1967, 89, 6288 CrossRef CAS.
  19. G. M. Sheldrick, SHELXTL PLUS, Siemens Analytical X-Ray Instruments, Madison, WI, 1990.
  20. SHELXTL version 5, Siemens Analytical X-Ray Instruments Inc., Madison, WI, 1995.
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