Syntheses, three types of hydrogen-bonded assembly structures, and magnetic properties of [FeIII(Him)2(hapen)]Y·solvent (Him = imidazole, hapen =N,N′-bis(2-hydroxyacetophenylidene)ethylenediamine, y = BPh4-, CF3SO3-, PF 6-, ClO4-, and BF4 -)

Masataka Koike, Keishiro Murakami, Takeshi Fujinami, Koshiro Nishi, Naohide Matsumoto, Yukinari Sunatsuki

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Five iron(III) complexes of [FeIII(Him)2(hapen)] Y·solvent with five different counter anions were synthesized, where Him = imidazole, H2hapen = N,N′-bis(2-hydroxyacetophenylidene) ethylenediamine, Y = BPh4- (1), CF3SO 3- (2), PF6- (3), ClO 4- (4), and BF4- (5), and solvent = methanol or H2O. Each FeIII ion has octahedral coordination geometry with N2O2 donor atoms of the equatorial tetradentate ligand (hapen) and two nitrogen atoms of two imidazoles at the axial positions. The imidazole group is hydrogen-bonded to the phenoxo oxygen atom of hapen of the adjacent unit and/or to the counter anion or solvent molecule, to give three types of assembly structures involving linear dimer, cyclic dimer, and one-dimensional zigzag chain. Compound 1, with a cyclic dimer, and 2 and 3, with a one-dimensional chain, showed spin-equilibrium behavior between high-spin (S = 5/2) and low-spin (S = 1/2) states, whereas 4 and 5, with linear dimers, are high-spin complexes. Compound 3 shows abrupt spin transition with small thermal hysteresis.

Original languageEnglish
Pages (from-to)185-192
Number of pages8
JournalInorganica Chimica Acta
Volume399
DOIs
Publication statusPublished - Apr 1 2013

Fingerprint

ethylenediamine
imidazoles
Dimers
Hydrogen
Magnetic properties
assembly
magnetic properties
dimers
hydrogen
synthesis
Atoms
Anions
Negative ions
Imidazoles
counters
anions
Methanol
Hysteresis
Nitrogen
Iron

Keywords

  • Assembly structures
  • Hydrogen bonds
  • Imidazole
  • Iron(III)
  • NO Schiff-base ligand
  • Spin equilibrium

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

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title = "Syntheses, three types of hydrogen-bonded assembly structures, and magnetic properties of [FeIII(Him)2(hapen)]Y·solvent (Him = imidazole, hapen =N,N′-bis(2-hydroxyacetophenylidene)ethylenediamine, y = BPh4-, CF3SO3-, PF 6-, ClO4-, and BF4 -)",
abstract = "Five iron(III) complexes of [FeIII(Him)2(hapen)] Y·solvent with five different counter anions were synthesized, where Him = imidazole, H2hapen = N,N′-bis(2-hydroxyacetophenylidene) ethylenediamine, Y = BPh4- (1), CF3SO 3- (2), PF6- (3), ClO 4- (4), and BF4- (5), and solvent = methanol or H2O. Each FeIII ion has octahedral coordination geometry with N2O2 donor atoms of the equatorial tetradentate ligand (hapen) and two nitrogen atoms of two imidazoles at the axial positions. The imidazole group is hydrogen-bonded to the phenoxo oxygen atom of hapen of the adjacent unit and/or to the counter anion or solvent molecule, to give three types of assembly structures involving linear dimer, cyclic dimer, and one-dimensional zigzag chain. Compound 1, with a cyclic dimer, and 2 and 3, with a one-dimensional chain, showed spin-equilibrium behavior between high-spin (S = 5/2) and low-spin (S = 1/2) states, whereas 4 and 5, with linear dimers, are high-spin complexes. Compound 3 shows abrupt spin transition with small thermal hysteresis.",
keywords = "Assembly structures, Hydrogen bonds, Imidazole, Iron(III), NO Schiff-base ligand, Spin equilibrium",
author = "Masataka Koike and Keishiro Murakami and Takeshi Fujinami and Koshiro Nishi and Naohide Matsumoto and Yukinari Sunatsuki",
year = "2013",
month = "4",
day = "1",
doi = "10.1016/j.ica.2013.01.021",
language = "English",
volume = "399",
pages = "185--192",
journal = "Inorganica Chimica Acta",
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TY - JOUR

T1 - Syntheses, three types of hydrogen-bonded assembly structures, and magnetic properties of [FeIII(Him)2(hapen)]Y·solvent (Him = imidazole, hapen =N,N′-bis(2-hydroxyacetophenylidene)ethylenediamine, y = BPh4-, CF3SO3-, PF 6-, ClO4-, and BF4 -)

AU - Koike, Masataka

AU - Murakami, Keishiro

AU - Fujinami, Takeshi

AU - Nishi, Koshiro

AU - Matsumoto, Naohide

AU - Sunatsuki, Yukinari

PY - 2013/4/1

Y1 - 2013/4/1

N2 - Five iron(III) complexes of [FeIII(Him)2(hapen)] Y·solvent with five different counter anions were synthesized, where Him = imidazole, H2hapen = N,N′-bis(2-hydroxyacetophenylidene) ethylenediamine, Y = BPh4- (1), CF3SO 3- (2), PF6- (3), ClO 4- (4), and BF4- (5), and solvent = methanol or H2O. Each FeIII ion has octahedral coordination geometry with N2O2 donor atoms of the equatorial tetradentate ligand (hapen) and two nitrogen atoms of two imidazoles at the axial positions. The imidazole group is hydrogen-bonded to the phenoxo oxygen atom of hapen of the adjacent unit and/or to the counter anion or solvent molecule, to give three types of assembly structures involving linear dimer, cyclic dimer, and one-dimensional zigzag chain. Compound 1, with a cyclic dimer, and 2 and 3, with a one-dimensional chain, showed spin-equilibrium behavior between high-spin (S = 5/2) and low-spin (S = 1/2) states, whereas 4 and 5, with linear dimers, are high-spin complexes. Compound 3 shows abrupt spin transition with small thermal hysteresis.

AB - Five iron(III) complexes of [FeIII(Him)2(hapen)] Y·solvent with five different counter anions were synthesized, where Him = imidazole, H2hapen = N,N′-bis(2-hydroxyacetophenylidene) ethylenediamine, Y = BPh4- (1), CF3SO 3- (2), PF6- (3), ClO 4- (4), and BF4- (5), and solvent = methanol or H2O. Each FeIII ion has octahedral coordination geometry with N2O2 donor atoms of the equatorial tetradentate ligand (hapen) and two nitrogen atoms of two imidazoles at the axial positions. The imidazole group is hydrogen-bonded to the phenoxo oxygen atom of hapen of the adjacent unit and/or to the counter anion or solvent molecule, to give three types of assembly structures involving linear dimer, cyclic dimer, and one-dimensional zigzag chain. Compound 1, with a cyclic dimer, and 2 and 3, with a one-dimensional chain, showed spin-equilibrium behavior between high-spin (S = 5/2) and low-spin (S = 1/2) states, whereas 4 and 5, with linear dimers, are high-spin complexes. Compound 3 shows abrupt spin transition with small thermal hysteresis.

KW - Assembly structures

KW - Hydrogen bonds

KW - Imidazole

KW - Iron(III)

KW - NO Schiff-base ligand

KW - Spin equilibrium

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U2 - 10.1016/j.ica.2013.01.021

DO - 10.1016/j.ica.2013.01.021

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SP - 185

EP - 192

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

SN - 0020-1693

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