Spin states of mono- and dinuclear iron(II) complexes with bis(imidazolylimine) ligands

Kunihiro Fujita, Ryohei Kawamoto, Ryohei Tsubouchi, Yukinari Sunatsuki, Masaaki Kojima, Seiichiro Iijima, Naohide Matsumoto

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Abstract

Bis(imidazolylimine) ligands, H 2L H and H 2L Me, were prepared from hydrazine and 4-formylimidazole or 2-methyl4-formylimidazole (1:2), respectively. Mononuclear iron(II) complexes, [Fe(H 2L H) 2](ClO 4) 2·MeOH and [Fe(H 2L Me) 2]-(ClO 4) 2·2H 2O, were in the LS and HS states, respectively, in the temperature range 5-300 K. A triple-helicate [Fe 2-(H 2L H) 3] (ClO 4) 4, showed an abrupt [LS-HS] to [HS-HS] spin transition at 240K, while [Fe 2(H 2L Me) 3](ClO 4) 4 remained in the LS state in the temperature range 5-300 K.

Original languageEnglish
Pages (from-to)1284-1285
Number of pages2
JournalChemistry Letters
Volume36
Issue number10
DOIs
Publication statusPublished - Oct 5 2007

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hydrazine
Iron
Ligands
Temperature

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  • Chemistry(all)

Cite this

Fujita, K., Kawamoto, R., Tsubouchi, R., Sunatsuki, Y., Kojima, M., Iijima, S., & Matsumoto, N. (2007). Spin states of mono- and dinuclear iron(II) complexes with bis(imidazolylimine) ligands. Chemistry Letters, 36(10), 1284-1285. https://doi.org/10.1246/cl.2007.1284

Spin states of mono- and dinuclear iron(II) complexes with bis(imidazolylimine) ligands. / Fujita, Kunihiro; Kawamoto, Ryohei; Tsubouchi, Ryohei; Sunatsuki, Yukinari; Kojima, Masaaki; Iijima, Seiichiro; Matsumoto, Naohide.

In: Chemistry Letters, Vol. 36, No. 10, 05.10.2007, p. 1284-1285.

Research output: Contribution to journalArticle

Fujita, K, Kawamoto, R, Tsubouchi, R, Sunatsuki, Y, Kojima, M, Iijima, S & Matsumoto, N 2007, 'Spin states of mono- and dinuclear iron(II) complexes with bis(imidazolylimine) ligands', Chemistry Letters, vol. 36, no. 10, pp. 1284-1285. https://doi.org/10.1246/cl.2007.1284
Fujita, Kunihiro ; Kawamoto, Ryohei ; Tsubouchi, Ryohei ; Sunatsuki, Yukinari ; Kojima, Masaaki ; Iijima, Seiichiro ; Matsumoto, Naohide. / Spin states of mono- and dinuclear iron(II) complexes with bis(imidazolylimine) ligands. In: Chemistry Letters. 2007 ; Vol. 36, No. 10. pp. 1284-1285.
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AU - Fujita, Kunihiro

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AU - Sunatsuki, Yukinari

AU - Kojima, Masaaki

AU - Iijima, Seiichiro

AU - Matsumoto, Naohide

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N2 - Bis(imidazolylimine) ligands, H 2L H and H 2L Me, were prepared from hydrazine and 4-formylimidazole or 2-methyl4-formylimidazole (1:2), respectively. Mononuclear iron(II) complexes, [Fe(H 2L H) 2](ClO 4) 2·MeOH and [Fe(H 2L Me) 2]-(ClO 4) 2·2H 2O, were in the LS and HS states, respectively, in the temperature range 5-300 K. A triple-helicate [Fe 2-(H 2L H) 3] (ClO 4) 4, showed an abrupt [LS-HS] to [HS-HS] spin transition at 240K, while [Fe 2(H 2L Me) 3](ClO 4) 4 remained in the LS state in the temperature range 5-300 K.

AB - Bis(imidazolylimine) ligands, H 2L H and H 2L Me, were prepared from hydrazine and 4-formylimidazole or 2-methyl4-formylimidazole (1:2), respectively. Mononuclear iron(II) complexes, [Fe(H 2L H) 2](ClO 4) 2·MeOH and [Fe(H 2L Me) 2]-(ClO 4) 2·2H 2O, were in the LS and HS states, respectively, in the temperature range 5-300 K. A triple-helicate [Fe 2-(H 2L H) 3] (ClO 4) 4, showed an abrupt [LS-HS] to [HS-HS] spin transition at 240K, while [Fe 2(H 2L Me) 3](ClO 4) 4 remained in the LS state in the temperature range 5-300 K.

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