Abstract
The synthesis and characterization of Ni(BCE) and Cu(BCE) (where
BCE = bis(3-chloroacetylacetone)ethylenediimine) are described. The
coordination geometry of Ni(BCE) was determined by X-ray
crystallography. It was found to be planar and four coordinate in the
solid state. The electrochemical properties of M(Chel), where M =
Co(II), Ni(II) and Cu(II), and Chel = BAE (bis(acetylacetone)
ethylenediimine), BBE = bis(benzoylacetone) ethylenediimine, BFE
(bis(1,1,1-triflouroacetylacetone) ethylenediimine and BCE ligands were
investigated in DMF and DMSO as solvents. The oxidation potentials
changed from left to right in the periodic table in the trend: Co < Ni <
Cu, while the reduction potentials changed according to the trend: Ni >
Co > Cu. The oxidation potentials of M(II) to M(III) (M = Ni and Cu)
increased according to the Schiff base ligands in the trend: BAE < BBE <
BCE < BFE, while the reduction potentials followed a reverse trend: BAE
> BBE > BCE > BFE. The oxidation potentials of M(II) to M(III) increased
according to the solvent in the trend: DMSO < DMF.
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