Synthesis, crystal structures and spectral properties of cobalt(II) complexes:: [CoL(N3)]•ClO4 and CoL(N3)2 [L = tris((3,5-dimethylpyrazol-1-yl)methyl)amine]

被引:0
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作者
Zhang, ZH [1 ]
Yang, HL [1 ]
Ma, ZH [1 ]
Qi, AD [1 ]
机构
[1] Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China
关键词
tripodal ligand; cobalt(II) complex; crystal structure; spectroscopic properties; azide ligand;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Two monomeric cobalt(II) complexes, [CoL(N-3)] . ClO4 (1) and CoL(N-3)(2) (2), where L is tris( (3,5-dimethylparazol-1-yl)methyl)amine, were synthesized and their crystal structures were determined by X-ray diffraction technique. Complex 1 is five coordinated with one azide nitrogen atom and four nitrogen atoms of the tris( (3,5-dimethylpyrazol-1-yl)methyl) amine ligand, and the metal center is in distorted trigonal bipyramidal environment. Complex 2 is six coordinated distorted octahedron with the two azide nitrogen atoms and four nitrogen donors of the tris( (3,5-dimethylpyrazol-1-yl)-methyl) amine ligand. The solution behaviors of the title complexes have been further investigated by UV-Vis, and H-1 NMR analysis. It is found that the formation of 1 and 2 depends on the molar ratio of the azide ion to metal salt and ligand. Complex I attached with one azide group is more stable and easy to generate than complex 2 incorporated with two azide groups, and the reasons were well discussed.
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页码:842 / 848
页数:7
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