Tetranuclear Mixed-valence Research Articles

A unique bromo- and thioether-bridged tetranuclear mixed-valence copper(I)-copper(II) compound with the N,S-donor ligand 4-((ethylthio)methyl)-5-methylimidazole

The mixed-valence compound tribromol{4-((ethylthio)methyl)-5-methylimidazole}copper(II)cooper(I), Cu 2 (C 7 H 12 N 2 S)Br 3 , forms spontaneously from an ethanol solution of copper(II) bromide and the ligand. The complex crystallizes as dark brown needles in the monoclinic space group I2/a

Synthesis and properties of mixed-valence copper molecules (.mu.-Y)N4CuII2CUI2X4 (N = N,N-diethylnicotinamide; Y = 3,4,5,6-tetrachlorocatecholate; X = Cl, Br, I) and the products and kinetics of their reactions with dioxygen and nitrobenzene

Tetranuclear copper(I) complexes [NCuX] 4 (N=N,N-diethylnicotinamide; X=Cl, Br, I react stoichiometrically with equimolar 3,4,5,6-tetrachloro-1,2-benzoquinone (Cl 4 BQ) under dinitrogen at room temperature in methylene chloride or nitrobenzene to give tetranuclear mixed-valence copper products (μ-Y)N 4 Cu II 2 Cu I 2 X 4 , where Y is 3,4,5,6-tetrachlorocatecholate. The electronic spectra of Va-c contain maxima in the region 750-820 nm that are due to their copper(II) centers

Formation and structure of the tetranuclear mixed valence anion [W (VI)2W (V)2S 12] 2-

Formation and structure of the tetranuclear mixed valence anion [W (VI)2W (V)2S 12] 2-