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

doi:10.1016/j.ica.2011.05.032

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

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

Advanced Science Research Center

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

A chiral spin crossover iron(II) complex, fac-Λ-[Fe ^II(HL^R)₃](ClO₄)₂· EtOH was synthesized and its crystal structures in both the high-spin (HS) and low-spin (LS) states were determined, where HL^R denotes 2-methylimidazol-4-yl-methylideneamino-R-(+)-1-methylphenyl. The complex assumes octahedral coordination geometry of N₆ donor atoms by three bidentate ligands HL^R. The complex exists as the facial-Λ- isomer of fac-Λ-[Fe^II(HL^R)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 (HL^R) induces the fac-Λ-isomer of fac-Λ-[Fe^II(HL^R)₃]²⁺ and the S-form of the ligand (HL^S) induces the fac-Δ-isomer of fac-Δ-[Fe(HL^S)₃]²⁺. The complex fac-Λ-[Fe^II(HL^R)₃](ClO₄) ₂·EtOH shows a complete steep spin crossover between the HS and the LS states at T_1/2 = 195 K.

Original language	English
Pages (from-to)	338-342
Number of pages	5
Journal	Inorganica Chimica Acta
Volume	375
Issue number	1
DOIs	https://doi.org/10.1016/j.ica.2011.05.032
Publication status	Published - Sept 1 2011

Keywords

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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10.1016/j.ica.2011.05.032

Cite this

@article{3617a973f43544a9afbabfff14726b17,

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

abstract = "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.",

keywords = "Bidentate ligand, Chiral ligand, Hydrogen bonds, Iron(II) complex, Spin crossover",

author = "Tomotaka Hashibe and Takeshi Fujinami and Daisuke Furusho and Naohide Matsumoto and Yukinari Sunatsuki",

note = "Funding Information: T. Hashibe was supported by the Research Fellowship of the Japan Society for the Promotion of Science , KAKENHI 00228936 . ",

year = "2011",

month = sep,

day = "1",

doi = "10.1016/j.ica.2011.05.032",

language = "English",

volume = "375",

pages = "338--342",

journal = "Inorganica Chimica Acta",

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T1 - Chiral spin crossover iron(II) complex, fac-Λ-[Fe II(HLR)3](ClO4)2· EtOH (HLR = 2-methylimidazol-4-yl-methylideneamino-R-(+)-1- methylphenyl)

AU - Hashibe, Tomotaka

AU - Fujinami, Takeshi

AU - Furusho, Daisuke

AU - Matsumoto, Naohide

AU - Sunatsuki, Yukinari

N1 - Funding Information: T. Hashibe was supported by the Research Fellowship of the Japan Society for the Promotion of Science , KAKENHI 00228936 .

PY - 2011/9/1

Y1 - 2011/9/1

N2 - 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.

AB - 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.

KW - Bidentate ligand

KW - Chiral ligand

KW - Hydrogen bonds

KW - Iron(II) complex

KW - Spin crossover

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