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|Title:||Tetranuclear bimetallic complexes of cobalt (II) and copper (II) with biadetylazinedihydrazone|
|Authors:||Mohapatra, B K|
Rout, A K
Pujapanda, P K
|Abstract:||Binuclear cobalt (II) complexes of biacetylazinedihydrazone (BAADH), CO2(BAADH)2X4 (X = Cl-, Br-, SCN-, NO) react with copper (II) halides to give tetranuclear bimetallic complexes [Co(BAADH)2X4][CuN2Y2)(Y=Cl-, Br-). IR and electronic spectra point to the presence of chromophores (CoN4X2) and (CuN2Y2) implying coordination of terminal NH2 groups of BAADH with (Copper (II) Electrochemical reduction of each complex occurs in two steps. The first step is a two-electron transfer process where each terminal copper (II) is transformed to copper (I) state. The more cathodic second step involve some electron where only one of the two inner core cobalt (II) ions is reduced to cobalt (I)state. The redox pattern is supported by additional evidence gathered from similar investigations on the linear trimeric [Cu(DMG)2] (CuCl2)2 species (DMG = dimethylglyoximate ion) and related species.|
|Appears in Collections:||IJC-A Vol.30A(07) [July 1991]|
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