Ferromagnetic versus antiferromagnetic exchange in oximato-bridged nickel(II) complexes

被引：14
|
作者：
An, Guang-Yu [1 ]
Wang, Hong-Bo [1 ]
Cui, Ai-Li [1 ]
Kou, Hui-Zhong [1 ]
机构：
[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
来源：
NEW JOURNAL OF CHEMISTRY | 2014年 / 38卷 / 10期
基金：
中国国家自然科学基金;
关键词：
CRYSTAL-STRUCTURE; COORDINATION CHEMISTRY; MAGNETIC-PROPERTIES; CLUSTERS; LIGAND; 2,6-DIACETYLPYRIDINE-DIOXIME; TETRANUCLEAR; OXIMES; SERIES; NI;
D O I：
10.1039/c4nj01055h
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Four Ni(II) complexes [Ni-2(Br-pao)(3)(Me(3)tacn)]ClO4 (1), [Ni-2(Br-pao)(3)(Me(3)tacn)]BF4 (2), [Ni-2(Hpyaox)(3)(Me(3)tacn)]BPh4 center dot 3MeOH (3) and [Ni-5(Hpyaox)(4)(pyaox)(2)L-2](ClO4)(2)center dot 4CH(3)CN center dot 2H(2)O (4) have been synthesized and characterized (Br-Hpao = 6-Br-2-pyridinealdoxime, Me(3)tacn = 1,4,7-trimethyl-1,4,7-triazacyclononane, H(2)pyaox = pyridine-2-amidoxime, L = 2-(2-aminoethylamino)ethanol). Complexes 1-3 have a similar triply oximato-bridged dinuclear structure, and complex 4 has a novel pentanuclear structure with three octahedral and two square planar Nib) ions. The variable temperature magnetic susceptibility measurement data show the antiferromagnetic (AFM) coupling for 1-3 and uncommon ferromagnetic (FM) coupling for 4. Furthermore, the oxime N-O bond lengths are a crucial factor affecting the magnetic coupling between two adjacent ions.
引用
收藏
页码：5037 / 5042
页数：6
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