Crystal Structures and Spin-Crossover Behavior of Iron(II) Complexes with Chiral and Racemic Ligands

Yusuke Sekimoto, Mohammad Razaul Karim, Naoto Saigo, Ryo Otani, Masaaki Nakamura, Shinya Hayami

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Chiral iron(II) complexes, [Fe{(R)-L}2(NCS)2] (1) and [Fe{(S)-L}2(NCS)2] (2), and racemic complex [Fe(rac)-L)2(NCS)2] (3) {L = α-methyl-N-(2-pyridinylmethylene)cyclohexanemethanamine} were synthesized. Their structures and magnetic properties were investigated by X-ray crystallography, magnetic susceptibility measurements, and Mössbauer spectroscopy. Complexes 1 and 2 crystallize in the trigonal system with space group P3121 and P3221, respectively. All complexes exhibit spin-crossover (SCO) behavior and light induced excited spin state trapping (LIESST) effects at 532 nm. Complexes 1 and 2 show similar gradual SCO behavior, and complex 3 shows more gradual SCO, which seems to be a result of the different crystal packing, as complex 3 is the symmetric isomer but 1 and 2 are asymmetric.

Original languageEnglish
Pages (from-to)1049-1053
Number of pages5
JournalEuropean Journal of Inorganic Chemistry
Volume2017
Issue number7
DOIs
Publication statusPublished - Jan 1 2017
Externally publishedYes

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X ray crystallography
Magnetic susceptibility
Isomers
Magnetic properties
Iron
Crystal structure
Spectroscopy
Ligands
Crystals

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

Cite this

Crystal Structures and Spin-Crossover Behavior of Iron(II) Complexes with Chiral and Racemic Ligands. / Sekimoto, Yusuke; Karim, Mohammad Razaul; Saigo, Naoto; Otani, Ryo; Nakamura, Masaaki; Hayami, Shinya.

In: European Journal of Inorganic Chemistry, Vol. 2017, No. 7, 01.01.2017, p. 1049-1053.

Research output: Contribution to journalArticle

Sekimoto, Yusuke ; Karim, Mohammad Razaul ; Saigo, Naoto ; Otani, Ryo ; Nakamura, Masaaki ; Hayami, Shinya. / Crystal Structures and Spin-Crossover Behavior of Iron(II) Complexes with Chiral and Racemic Ligands. In: European Journal of Inorganic Chemistry. 2017 ; Vol. 2017, No. 7. pp. 1049-1053.
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AU - Nakamura, Masaaki

AU - Hayami, Shinya

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N2 - Chiral iron(II) complexes, [Fe{(R)-L}2(NCS)2] (1) and [Fe{(S)-L}2(NCS)2] (2), and racemic complex [Fe(rac)-L)2(NCS)2] (3) {L = α-methyl-N-(2-pyridinylmethylene)cyclohexanemethanamine} were synthesized. Their structures and magnetic properties were investigated by X-ray crystallography, magnetic susceptibility measurements, and Mössbauer spectroscopy. Complexes 1 and 2 crystallize in the trigonal system with space group P3121 and P3221, respectively. All complexes exhibit spin-crossover (SCO) behavior and light induced excited spin state trapping (LIESST) effects at 532 nm. Complexes 1 and 2 show similar gradual SCO behavior, and complex 3 shows more gradual SCO, which seems to be a result of the different crystal packing, as complex 3 is the symmetric isomer but 1 and 2 are asymmetric.

AB - Chiral iron(II) complexes, [Fe{(R)-L}2(NCS)2] (1) and [Fe{(S)-L}2(NCS)2] (2), and racemic complex [Fe(rac)-L)2(NCS)2] (3) {L = α-methyl-N-(2-pyridinylmethylene)cyclohexanemethanamine} were synthesized. Their structures and magnetic properties were investigated by X-ray crystallography, magnetic susceptibility measurements, and Mössbauer spectroscopy. Complexes 1 and 2 crystallize in the trigonal system with space group P3121 and P3221, respectively. All complexes exhibit spin-crossover (SCO) behavior and light induced excited spin state trapping (LIESST) effects at 532 nm. Complexes 1 and 2 show similar gradual SCO behavior, and complex 3 shows more gradual SCO, which seems to be a result of the different crystal packing, as complex 3 is the symmetric isomer but 1 and 2 are asymmetric.

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