Constrained ferromagnetic coupling in dinuclear µ1,3-azido nickel(II) cryptate compounds. Crystal structure and magnetic behaviour of [Ni2(L1)(N3)(H2O)][CF3SO3]3·2H2O·EtOH {L1 = N[(CH2)2NHCH2(C6H4-m)CH2NH(CH2)2]3N}[hair space]

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Albert Escuer, Charles J. Harding, Yann Dussart, Jane Nelson, Vickie McKee and Ramon Vicente


Abstract

The new dinuclear compounds [Ni2(L1)(N3)(H2O)][CF3SO3]3·4H2O 1, [Ni2(L1)(N3)][ClO4]3·MeCN· 2H2O 2, [Co2(L1)(N3)][ClO4]3·H2O 3, and [Mn2(L2)(N3)][CF3SO3]3 4 have been prepared {L1 = N[(CH2)2NHCH2(C6H4-m)CH2NH(CH2)2]3N; L2 = N[(CH2)2NHCH2(C6H4-p)CH2NH(CH2)2]3N}. The crystal structure of [Ni2(L1)(N3)(H2O)][CF3SO3]3·2H2O·EtOH: has been determined. From magnetic measurements 1 and 2 show ferromagnetic coupling, whereas 3 and 4 show antiferromagnetic coupling. The best fit parameters are: 2J = 11.82 cm–1, g = 2.13, D = 0.096 cm–1 and 2zJ′ = –0.72 cm–1 for 1, 2J = 7.72 cm–1, g = 2.12, D = –2.38 cm–1 and 2zJ′ = –0.95 cm–1 for 2, 2J = –4.1 cm–1, g = 2.11 for 3, and 2J = –12.1 cm–1, g = 1.98 for 4. The magnetic results can be correlated with those predicted on the basis of an earlier model.


References

  1. A. Escuer, R. Vicente, J. Ribas, M. S. El Fallah, X. Solans and M. Font-Bardía, Inorg. Chem., 1993, 32, 3727 CrossRef CAS.
  2. A. Escuer, R. Vicente, J. Ribas, M. S. El Fallah, X. Solans and M. Font-Bardía, Inorg. Chem., 1994, 33, 1842 CrossRef CAS.
  3. A. Escuer, R. Vicente, M. A. S. Goher and F. Mautner, Inorg. Chem., 1996, 35, 6386 CrossRef CAS.
  4. A. Escuer, R. Vicente, M. S. El Fallah, X. Solans and M. Font-Bardía, J. Chem. Soc., Dalton Trans., 1996, 1013 RSC.
  5. A. Escuer, R. Vicente, X. Solans and M. Font-Bardía, Inorg. Chem., 1994, 33, 6007 CrossRef CAS.
  6. J.-M. Lehn, Pure Appl. Chem., 1980, 52, 2441 CrossRef CAS.
  7. C. J. Harding, Q. Lu, J. F. Malone, D. J. Marrs, N. Martin, V. McKee and J. Nelson, J. Chem. Soc., Dalton Trans., 1995, 1739 RSC.
  8. Q. Lu, J. M. Latour, C. J. Harding, N. Martin, D. J. Marrs, V. McKee and J. Nelson, J. Chem. Soc., Dalton Trans., 1994, 1471 RSC.
  9. M. G. B. Drew, J. Hunter, D. J. Marrs, J. Nelson and C. J. Harding, J. Chem. Soc., Dalton Trans., 1992, 3235 RSC.
  10. Q. Lu, C. J. Harding, V. McKee and J. Nelson, J. Chem. Soc., Chem. Commun., 1993, 1768 RSC.
  11. C. J. Harding, F. E. Mabbs, E. J. MacInnes, V. McKee and J. Nelson, J. Chem. Soc., Dalton Trans., 1996, 3227 RSC.
  12. M. G. B. Drew, P. Yates, C. J. Harding, D. McDowell, C. Stevenson, S. Raghunathan and J. Nelson, J. Chem. Soc., Dalton Trans., 1990, 2521 RSC.
  13. F. A. Deeney, C. J. Harding, G. G. Morgan, V. McKee, J. Nelson, S. J. Teat and W. Clegg, J. Chem. Soc., Dalton Trans., 1998, 1837 RSC.
  14. A. P. Ginsberg, Inorg. Chem., 1972, 11, 2884 CrossRef CAS.
  15. P. J. Hay, J. C. Thibeault and R. Hoffmann, J. Am. Chem. Soc., 1975, 97, 4884 CrossRef CAS.
  16. C. Mealli and D. M. Proserpio, CACAO program (Computed Aided Composition of Atomic Orbitals)J. Chem. Educ. 1990, 67, 399 Search PubMed.
  17. S. S. Tandon, L. K. Thompson, M. E. Manuel and J. N. Bridson, Inorg. Chem., 1994, 33, 5555 CrossRef CAS.
  18. G. M. Sheldrick, SHELXL 97, University of Göttingen, 1997.
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