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

被引：4

作者：

Fujinami, Takeshi ^{[1
]}

Hamada, Daisuke ^{[1
]}

Matsumoto, Naohide ^{[1
]}

Sunatsuki, Yukinari ^{[2
]}

Irie, Ryo ^{[1
]}

机构：

[1] Kumamoto Univ, Grad Sch Sci & Technol, Dept Chem, Kumamoto 8608555, Japan

[2] Okayama Univ, Fac Sci, Dept Chem, Okayama 7008530, Japan

来源：

INORGANICA CHIMICA ACTA | 2015年 / 430卷

基金：

日本学术振兴会;

关键词：

Iron(III); Spin crossover; Imidazole; 1-Methyimidazole; N2O2 Schiff-base ligand; QUADRIDENTATE SCHIFF-BASES; IRON(III) COMPLEXES; MAGNETIC-PROPERTIES; THERMAL HYSTERESIS; CRYSTAL-STRUCTURES; CROSSOVER; TRANSITION; STATES; N; N'-BIS(2-HYDROXYACETOPHENYLIDENE)ETHYLENEDIAMINE; BEHAVIOR;

D O I：

10.1016/j.ica.2015.03.008

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two iron(III) complexes [(FeX2L)-X-III]BPh4 center dot 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 N-2 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. (C) 2015 Elsevier B. V. All rights reserved.

引用

页码：239 / 244

页数：6

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