New Fe(II) complexes with Schiff base ligand: Synthesis, spectral characterization, magnetic studies and thermal stability

被引：10
|
作者：
Fik, Marta A. [1 ]
Loeffler, Marta [2 ]
Weselski, Marek [2 ]
Kubicki, Maciej [1 ]
Korabik, Maria J. [2 ]
Patroniak, Violetta [1 ]
机构：
[1] Adam Mickiewicz Univ, Fac Chem, PL-61614 Poznan, Poland
[2] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland
来源：
POLYHEDRON | 2015年 / 102卷
关键词：
Coordination chemistry; Iron(II) complex; Schiff base; Magnetism; Mossbauer spectroscopy; SPIN-CROSSOVER; CRYSTAL-STRUCTURES; IRON; STATE;
D O I：
10.1016/j.poly.2015.10.050
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
New ligand (2)-2-(1-methyl-2-(pyridine-2-ylmethylene)hydrazinyl)benzoxazole (L) reacts with Fe(II) ions what results in formation of mononuclear complexes of 2:1 stoichiometry (complexes 1 and 2), which crystallize in the rare space group la-3d (No. 230) with solvent-acetonitrile-molecules in the crystal structure. Obtained complexes were studied in terms of their properties in the solid state concerning thermal stability and magnetism. N-3-donor Schiff base type Lisa strong crystal field ligand, therefore both obtained Fe(II) complexes are diamagnetic at room temperature what has been confirmed by magnetic susceptibility measurements and Mossbauer spectroscopy. However, the reversible LS ((1)A(1)) <-> HS (T-5(2)) spin-transitions may be observed starting above room temperature, remaining incomplete even up to 400 K. The thermal stability and electronic reflectance spectra of complexes were determined as well. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：609 / 614
页数：6
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