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Hyperfine Interactions

, Volume 84, Issue 1, pp 471–476 | Cite as

Crystal structures and Mössbauer spectra of spin-crossover iron(III) complexes of quinquedentate ligands

  • Yonezo Maeda
  • Yosuke Noda
  • Hiroki Oshio
  • Yoshimasa Takashima
  • Naohide Matsumoto
Invited Paper

Abstract

Magnetic properties, Mössbauer spectra and crystal structures of spin-crossover iron(III) complexes with a quinquedentate ligand [FeLX]BPh4 are reported. X and L denote a unidentate ligand and a quinquedentate ligand, respectively. [Fe(mbpN)(im)]BPh4 shows spin-crossover behavior in an appropriate organic solvent, and [Fe(mbpN)(lut)]BPh4, [Fe(bpN)(py)]BPh4 and [Fe(salten)X]BPh4 (X=4me-py or 2me-im) show spin-crossover behavior in a solid and in an organic solvent. It was found that the ligand field strength of salten was stronger than that of mbpN. The rates of spin-state interexchange in the complexes are as fast as the inverse of the lifetime (1×10−7 s) of the Mössbauer nuclear level. The Mössbauer spectroscopic behavior of [Fe(mbpN)(lut)]BPh4 and [Fe(bpN)(py)]BPh4 is different to that of [Fe(salten)X]BPh4 (X=4me-py or 2me-im). The difference was ascribed to the different geometrical positions of the corresponding anions.

Keywords

Iron Thin Film Crystal Structure Magnetic Property Field Strength 
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.

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References

  1. [1]
    Y. Maeda, N. Tsutsumi and Y. Takashima, Inorg. Chem. 23(1984)2440;Google Scholar
  2. [1a]
    Y. Maeda and Y. Takashima, Comments Inorg. Chem. 7(1988)41.Google Scholar
  3. [2]
    M.D. Timken, C.E. Strouse, S.M. Soltis, S.A. Daverio, D.N. Hendrickson, A.M. Adel-Mawgoud and S.R. Wilson, J. Am. Chem. Soc. 108(1986)395.Google Scholar
  4. [3]
    E. König, G. Ritter, J. Dengler and L.F. Larkworthy, Inorg. Chem. 31(1992)1196.Google Scholar
  5. [4]
    N. Matsumoto, S. Ohta, C. Yoshimura, A. Ohyoshi, S. Kohata, H. Okawa and Y. Maeda, J. Chem. Soc. Dalton Trans. (1985)2575.Google Scholar
  6. [5]
    T.L. Bohan, J. Magn. Reson. 26(1977)109.Google Scholar
  7. [6]
    Y. Maeda, Y. Noda, H. Oshio and Y. Takashima, Hyp. Int. 80(1993)1099.Google Scholar
  8. [7]
    Y. Maeda, Y. Takashima, N. Matsumoto and A. Ohyoshi, J. Chem. Soc. Dalton Trans. (1986)1115.Google Scholar
  9. [8]
    M. Blume, Phys. Rev. Lett. 14(1965)96.Google Scholar
  10. [9]
    Y. Maeda, Y. Noda, H. Oshio and Y. Takashima, Bull. Chem. Soc. Jpn. 65(1992)1825.Google Scholar

Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • Yonezo Maeda
    • 1
  • Yosuke Noda
    • 1
  • Hiroki Oshio
    • 2
  • Yoshimasa Takashima
    • 1
  • Naohide Matsumoto
    • 1
  1. 1.Department of Chemistry, Faculty of ScienceKyushu UniversityFukuokaJapan
  2. 2.Department of Chemistry, Faculty of ScienceTohoku UniversitySendaiJapan

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