Synthesis and Characterization of 1, 4- Dihydroquinoxaline-2,3-Dione Derivativesbased Co (Ii) and Ni (Ii) Complexes
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Date
2020-08-08
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Addis Ababa University
Abstract
In recent years, there has been enhanced interest in the synthesis and characterization
of transition metal complexes containing Schiff bases as ligands due to their
importance. According to this concept, two Schiff base complexes, [CoL2Cl2] and
[NiL2]Cl2 were synthesized based on the Schiff base ligand that was a result of
condensation of 1, 4-dihydroquinoxaline-2, 3-dione and 3-hydroquinoxaline-2(1H)-
one. In the process of formation of the ligand and complexes, chemicals like OPD,
diethyl oxalate, hydrazine, ethylenediamine, Co (II) and Ni (II) chloride salts, and
solvents such as diethyl ether, methanol, butanol, were used. The synthesized ligand
and complexes were characterized using IR, UV-Vis., molar conductivity, AAS, and
other physical measurements such as melting point and solubility were determined.
Based on the physico-chemical analysis, octahedral structure of Co (II) complex and
square planar structure of Ni (II) complex were proposed.
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Keywords
OPD, 1, 4-Diyhydroquinoxaline-1, 3-Dione, 3-Hydroquinoxaline, Ni (Ii) and Co (Ii)