Synthesis, structure, and spin equilibrium properties of [FeIIIX2L]BPh4 solvents (X = 1-methylimidazole and imidazole; L = N, N′-bis(3-ethoxycarbonylsalicylidene)ethylenediamine)

Takeshi Fujinami; Daisuke Hamada; Naohide Matsumoto; Yukinari Sunatsuki; Ryo Irie

doi:10.1016/j.ica.2015.03.008

Synthesis, structure, and spin equilibrium properties of [Fe^IIIX₂L]BPh₄ solvents (X = 1-methylimidazole and imidazole; L = N, N′-bis(3-ethoxycarbonylsalicylidene)ethylenediamine)

Takeshi Fujinami, Daisuke Hamada, Naohide Matsumoto, Yukinari Sunatsuki, Ryo Irie

Advanced Science Research Center

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

2 Citations (Scopus)

Abstract

Two iron(III) complexes [Fe^IIIX₂L]BPh₄ solvents (X = 1-Meim (1), Him (2)) were synthesized and the crystal structures were determined, where H₂L = N, N'-bis(3-ethoxycarbonylsalicylidene)ethylenediamine, 1-Meim = 1-methylimidazole, Him = imidazole, BPh₄^- = tetraphenylborate. Fe^III ion has an octahedral coordination environment by N₂O₂ donor atoms of equatorial L^2- and N₂ donor atoms of axial imidazoles. Complex 1 is described as isolated molecule, while complex 2 has a hydrogen-bonded cyclic dimer structure constructed by hydrogen-bond between imidazole group and ethoxycarbonyl oxygen via ethanol. Complex 1 is in a high-spin (S = 5/2) state over the whole temperature region 5-300 K, while complex 2 showed a gradual complete spin equilibrium between high and low-spin states at T_1/2 = 192 K.

Original language	English
Pages (from-to)	239-244
Number of pages	6
Journal	Inorganica Chimica Acta
Volume	430
DOIs	https://doi.org/10.1016/j.ica.2015.03.008
Publication status	Published - May 1 2015

Keywords

1-Methyimidazole
Imidazole
Iron(III)
NO Schiff-base ligand
Spin crossover

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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Synthesis, structure, and spin equilibrium properties of [Fe^IIIX₂L]BPh₄ solvents (X = 1-methylimidazole and imidazole; L = N, N′-bis(3-ethoxycarbonylsalicylidene)ethylenediamine). / Fujinami, Takeshi; Hamada, Daisuke; Matsumoto, Naohide; Sunatsuki, Yukinari; Irie, Ryo.

In: Inorganica Chimica Acta, Vol. 430, 01.05.2015, p. 239-244.

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

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title = "Synthesis, structure, and spin equilibrium properties of [FeIIIX2L]BPh4 solvents (X = 1-methylimidazole and imidazole; L = N, N′-bis(3-ethoxycarbonylsalicylidene)ethylenediamine)",

abstract = "Two iron(III) complexes [FeIIIX2L]BPh4 solvents (X = 1-Meim (1), Him (2)) were synthesized and the crystal structures were determined, where H2L = N, N'-bis(3-ethoxycarbonylsalicylidene)ethylenediamine, 1-Meim = 1-methylimidazole, Him = imidazole, BPh4- = tetraphenylborate. FeIII ion has an octahedral coordination environment by N2O2 donor atoms of equatorial L2- and N2 donor atoms of axial imidazoles. Complex 1 is described as isolated molecule, while complex 2 has a hydrogen-bonded cyclic dimer structure constructed by hydrogen-bond between imidazole group and ethoxycarbonyl oxygen via ethanol. Complex 1 is in a high-spin (S = 5/2) state over the whole temperature region 5-300 K, while complex 2 showed a gradual complete spin equilibrium between high and low-spin states at T1/2 = 192 K.",

keywords = "1-Methyimidazole, Imidazole, Iron(III), NO Schiff-base ligand, Spin crossover",

author = "Takeshi Fujinami and Daisuke Hamada and Naohide Matsumoto and Yukinari Sunatsuki and Ryo Irie",

note = "Funding Information: T. Fujinami was supported by the Research Fellowship for Young Scientists of the Japan Society for the Promotion of Science, KAKENHI 00248556 . ",

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T1 - Synthesis, structure, and spin equilibrium properties of [FeIIIX2L]BPh4 solvents (X = 1-methylimidazole and imidazole; L = N, N′-bis(3-ethoxycarbonylsalicylidene)ethylenediamine)

AU - Fujinami, Takeshi

AU - Hamada, Daisuke

AU - Matsumoto, Naohide

AU - Sunatsuki, Yukinari

AU - Irie, Ryo

N1 - Funding Information: T. Fujinami was supported by the Research Fellowship for Young Scientists of the Japan Society for the Promotion of Science, KAKENHI 00248556 .

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Two iron(III) complexes [FeIIIX2L]BPh4 solvents (X = 1-Meim (1), Him (2)) were synthesized and the crystal structures were determined, where H2L = N, N'-bis(3-ethoxycarbonylsalicylidene)ethylenediamine, 1-Meim = 1-methylimidazole, Him = imidazole, BPh4- = tetraphenylborate. FeIII ion has an octahedral coordination environment by N2O2 donor atoms of equatorial L2- and N2 donor atoms of axial imidazoles. Complex 1 is described as isolated molecule, while complex 2 has a hydrogen-bonded cyclic dimer structure constructed by hydrogen-bond between imidazole group and ethoxycarbonyl oxygen via ethanol. Complex 1 is in a high-spin (S = 5/2) state over the whole temperature region 5-300 K, while complex 2 showed a gradual complete spin equilibrium between high and low-spin states at T1/2 = 192 K.

AB - Two iron(III) complexes [FeIIIX2L]BPh4 solvents (X = 1-Meim (1), Him (2)) were synthesized and the crystal structures were determined, where H2L = N, N'-bis(3-ethoxycarbonylsalicylidene)ethylenediamine, 1-Meim = 1-methylimidazole, Him = imidazole, BPh4- = tetraphenylborate. FeIII ion has an octahedral coordination environment by N2O2 donor atoms of equatorial L2- and N2 donor atoms of axial imidazoles. Complex 1 is described as isolated molecule, while complex 2 has a hydrogen-bonded cyclic dimer structure constructed by hydrogen-bond between imidazole group and ethoxycarbonyl oxygen via ethanol. Complex 1 is in a high-spin (S = 5/2) state over the whole temperature region 5-300 K, while complex 2 showed a gradual complete spin equilibrium between high and low-spin states at T1/2 = 192 K.

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KW - Iron(III)

KW - NO Schiff-base ligand

KW - Spin crossover

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