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Synthesis, crystal structures and spectral properties of cobalt (II) complexes: [ Col (N 3 ) ] · ClO 4 and CoL (N 3 ) 2 [L = tris( (3,5‐dimethylpyrazol‐1‐yl) methyl)amine]
Author(s) -
Zhang ZhiHui,
Yang HaiLong,
Ma ZhiHong,
Qi AiDi
Publication year - 2000
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20000180609
Subject(s) - chemistry , azide , trigonal bipyramidal molecular geometry , ligand (biochemistry) , octahedron , amine gas treating , crystallography , crystal structure , tris , cobalt , metal , tripodal ligand , stereochemistry , inorganic chemistry , organic chemistry , biochemistry , receptor
Two monomeric cobalt(II) complexes, [CoL(N 3 )]ClO 4 (1) and CoL(N 3 ) 2 (2), where L is tris((3,5‐dimethylpyrazol‐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‐dimethyipyrazol‐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‐l‐yl)‐methyl) amine ligand. The solution behaviors of the title complexes have been further investigated by UV‐Vis, and 1 H 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 1 attached with one aside group is more stable and easy to generate than complex 2 incorporated with two azide groups, and the reasons were well discussed.