Pyrimidine-based iron(III) complexes of 2-(pyrimidin-2-ylhydrazonomethyl)-phenol: Synthesis, crystal structure and magnetic properties

被引：1
|
作者：
Yuan, Juan [1 ,2 ]
Pei, Li-Xin [1 ]
Song, Jun-Ying [1 ]
Kou, Hui-Zhong [2 ]
机构：
[1] Henan Univ Chinese Med, Sch Pharm, Zhengzhou 450046, Henan, Peoples R China
[2] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
来源：
INORGANICA CHIMICA ACTA | 2018年 / 479卷
基金：
中国国家自然科学基金;
关键词：
Fe(III) ion; Pyrimidine; Schiff-base ligand; Magnetism; Crystal structure; Spin crossover; SPIN-CROSSOVER COMPLEXES; INTERMOLECULAR INTERACTIONS; STATE INTERCONVERSION; COORDINATION POLYMER; ROOM-TEMPERATURE; SOLID-STATE; TRANSITION; COMPOUND; DYNAMICS; 2-STEP;
D O I：
10.1016/j.ica.2018.04.051
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
New pyrimidine Schiff base Fe(III) complexes, [Fe-III(HL)(2)]ClO4 .2CH(3)CN.2H(2)O (1), [Fe-III(HL)(2)]BF4.H2O(2) and [Fe-III(HL)(2)]PF6.CH3OH (3) (H2L = 2-(pynmidin-2-ylhydrazonomethyl)phenol), have been synthesized and characterized by single-crystal X-ray diffraction, magnetic, thermogravimetric and UV-vis spectroscopy. Structural data of complexes 1-3 indicate that they are all mononuclear and the coordination configuration of central Fe(III) ions is N4O2 octahedron. The Fe-O and Fe-N bond distances are in the range of 1.886-1.924 A and 2.130-2.170 A, respectively, typical of the high-spin Fe(III) at 273 K (complex 1) or 293 K (complexes 2 and 3). Magnetic studies show that complex 1 exhibits the spin crossover behavior with a hysteretic loop of 13 K (T-1/2 down arrow = 144 K and T-1/2 up down arrow = 157 K), while complexes 2 and 3 are high spin down to 5 K. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：254 / 260
页数：7
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