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	The ternary metal mixed ligand complexes formed by benzimidazole and N,N-bis( 2-hydroxyethyl) glycine
	He, X. F. ; Long, L. S. ; Long LS(龙腊生) ; Wu, F. H. ; Le, X. Y. ; Chen, X. M. ; Ji, L. N. ; Zhou, Z. Y.
	1999
关键词	crystal structure ternary mixed ligand complex Bicine stability constant copper
英文摘要	The stability constants of the ternary M(Bit)(Bzim)(+) complexes, where M2+ = Cu2+, Ni2+ or Zn2+ Bic(-) = the anion of N, N-bis(2-hydroxyethyl) glycine and Bzim = benzimidazole, were determined by potentiometric pH titration in aqueous solution. One of them (M2+ = Cu2+) was also separately determined by spectrophotometry. The results show that these ternary complexes are stabler than expected on statistical grounds. The enhanced stability of the ternary M(Bic) (Bzim)(+) complexes is attributed to the pi(A)-pi(B) cooperative effect between Bic(-) and benzimidazole. Besides, compared with Cu(Bic) (Bzim)(+) and Ni(Bic) (Bzim)(+), the ternary Zn(Bic) (Bzim)(+) complex has relatively high stability. The crystal structure of [Cu(Bic)(Bzim)] CiO(4) was determined by single crystal X-ray diffraction techniques. The copper atom has a trigonal-bipyramidal geometry, the basal plane is formed by an oxygen atom of the carboxylato group and two hydroxyl oxygen atoms, the apical position is occupied by a nitrogen atom of Bic(-) and a nitrogen atom of benzimidazole. The molecular structure of Cu(Bic) (Bzim)(+) in aqueous solution is different from that in the crystalline state. The results of ESR and electronic spectra show that the structure of this complex is octahedron in aqueous solution.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/64763]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	He, X. F.,Long, L. S.,Long LS,et al. The ternary metal mixed ligand complexes formed by benzimidazole and N,N-bis( 2-hydroxyethyl) glycine[J],1999.
APA	He, X. F..,Long, L. S..,龙腊生.,Wu, F. H..,Le, X. Y..,...&Zhou, Z. Y..(1999).The ternary metal mixed ligand complexes formed by benzimidazole and N,N-bis( 2-hydroxyethyl) glycine..
MLA	He, X. F.,et al."The ternary metal mixed ligand complexes formed by benzimidazole and N,N-bis( 2-hydroxyethyl) glycine".(1999).

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