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


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.


Iron Thin Film Crystal Structure Magnetic Property Field Strength 
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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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