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