Synthesis and Characterization of 1,4-Dihydroquinoxaline -2, 3-Dione Derivatives-Based Zn (Ii) and Cd (Ii) Complexes.
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Date
2020-05-22
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Addis Ababa University
Abstract
Coordination compounds play vital roles in biology, biochemistry and medicine,
controlling the structure and function of many enzymes and their metabolism. They
find varied application in many industrial processes and in the development of new
materials with specifically designed properties. Thus, synthesis and study of the
complexes is very important. In this work, equimolar quantities of o-phenylene
diamine and oxalic acid were ground with pestle in a mortar to produce 1,4-dihydroquinoxaline
2,3-dione, which behaves as a bidentate O,N donor ligand by solvent free
method. The new ligand 3-(2-hydroxy-phenylalanine) qunioxaline-2-one was
synthesized by mixed equimolar ratio of 1,4-dihydro-quinoxaline-2,3-dione with 2-
amonphenol by conventional method. Zn (II) and Cd (II) complexes were synthesized
from mixed the ligand 1,4-dihydro-quinoxaline-2,3-dione derivative ligand with salts
of anhydrous Zn(II) nitrate and anhydrous Cd(II) chloride by template method. These
complexes and ligand have been characterized with the help of various spectra
technique, such as AAS, IR, UV/VIS spectroscopic techniques as well as molar
conductance, chloride test and melting point measurements have been done as
supports to conclude the structures of the complexes. The square planer geometry was
proposed for Zn-L complex and tetrahedron geometry was proposed for Cd-L
complex.
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Keywords
1,4-Hydroquinoxaline2, 3 dione, 2-Aminophenol, 3-(2-Hydroxylphenylalanine), Qunioxaline2-One