TY - JOUR
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 .
Publisher Copyright:
© 2015 Published by Elsevier B.V.
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.
KW - 1-Methyimidazole
KW - Imidazole
KW - Iron(III)
KW - NO Schiff-base ligand
KW - Spin crossover
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U2 - 10.1016/j.ica.2015.03.008
DO - 10.1016/j.ica.2015.03.008
M3 - Article
AN - SCOPUS:84961288071
VL - 430
SP - 239
EP - 244
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
SN - 0020-1693
ER -