Chiral spin crossover iron(II) complex, fac-Λ-[Fe II(HLR)3](ClO4)2· EtOH (HLR = 2-methylimidazol-4-yl-methylideneamino-R-(+)-1- methylphenyl)

Tomotaka Hashibe, Takeshi Fujinami, Daisuke Furusho, Naohide Matsumoto, Yukinari Sunatsuki

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18 Citations (Scopus)


A chiral spin crossover iron(II) complex, fac-Λ-[Fe II(HLR)3](ClO4)2· EtOH was synthesized and its crystal structures in both the high-spin (HS) and low-spin (LS) states were determined, where HLR denotes 2-methylimidazol-4-yl-methylideneamino-R-(+)-1-methylphenyl. The complex assumes octahedral coordination geometry of N6 donor atoms by three bidentate ligands HLR. The complex exists as the facial-Λ- isomer of fac-Λ-[FeII(HLR)3] 2+ of the possible geometrical fac- and mer-isomers and the Δ- and Λ-enantiomorphs. The X-ray structural analyses revealed that the R-form of the ligand (HLR) induces the fac-Λ-isomer of fac-Λ-[FeII(HLR)3]2+ and the S-form of the ligand (HLS) induces the fac-Δ-isomer of fac-Δ-[Fe(HLS)3]2+. The complex fac-Λ-[FeII(HLR)3](ClO4) 2·EtOH shows a complete steep spin crossover between the HS and the LS states at T1/2 = 195 K.

Original languageEnglish
Pages (from-to)338-342
Number of pages5
JournalInorganica Chimica Acta
Issue number1
Publication statusPublished - Sep 1 2011


  • Bidentate ligand
  • Chiral ligand
  • Hydrogen bonds
  • Iron(II) complex
  • Spin crossover

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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