Structural, electrochemical and spectroscopic characterization of a new [Cu2L2(μ-Cl)2]2[CuCl4]2 dimer complex
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- 作者：Scarpellini ; Marciela ; Neves ; Ademir ; Castellano ; Eduardo E. ; Franco ; Douglas W.
- 关键词：Copper complexes ; Dinuclear complexes ; Crystal structure ; Cyclic voltammetry ; HISMIMA ; ([(2-(imidazol-4-yl)ethyl)(1-methylimidazol-2-yl)methyl)amine) ; TBAPF6 ; tetrabuthylammonium hexafluorophosphate ; dienSS ; 1 ; 7-dithenylidene-1 ; 4 ; 7-triazaheptan
- 刊名：Journal of Molecular Structure
- 出版年：2004
- 出版时间：June, 2004
- 年：2004
- 卷：694
- 期：1-3
- 页码：193-198
- 全文大小：154 K
文摘
The bis{(μ2-chloro)[2-(imidazol-4-yl)ethyl][(1-methylimidazol-2-yl)methyl]amine}dicopper(II) bis[tetrachloro-cuprate (II)] complex [Cu2(HISMIMA)2Cl2]2(CuCl4)2 (HISMIMA:[(2-(imidazol-4-yl)ethyl)(1-methylimidazol-2-yl)methyl)amine]) was obtained by serendipity during the reaction of the mononuclear [Cu(HISMIMA)Cl2] complex and gaseous nitric oxide in methanolic solution. The title complex unit cell has the composition: an anion complex {[Cu2(HISMIMA)2Cl2][CuCl4]2}2− (1) and a cation complex [Cu2(HISMIMA)2Cl2]2+ (2). Cation 2 displays a crystallographic centrosymmetric Cu2Cl2 core with each CuII atom coordinated to the tripodal ligand in a square pyramidal geometry (Addison parameter τ=0.07). In 1, a distorted octahedral geometry is observed, in which the CuII ions are coordinated in a way similar to that in 2 but with an additional interaction with the [CuCl4]2− ions. Cyclic voltammetric experiments reveal that the title complex does not dissociate in acetonitrile solution and has E1/2