Synthesis And Characterization Of 14-dihydroquinoxaline -2 3-dione Derivatives-based Zn (ii) And Cd (ii) Complexes.

Coordination compounds play vital roles in biology, biochemistry and medicine,rncontrolling the structure and function of many enzymes and their metabolism. Theyrnfind varied application in many industrial processes and in the development of newrnmaterials with specifically designed properties. Thus, synthesis and study of therncomplexes is very important. In this work, equimolar quantities of o-phenylenerndiamine and oxalic acid were ground with pestle in a mortar to produce 1,4-dihydroquinoxalinern2,3-dione, which behaves as a bidentate O,N donor ligand by solvent freernmethod. The new ligand 3-(2-hydroxy-phenylalanine) qunioxaline-2-one wasrnsynthesized by mixed equimolar ratio of 1,4-dihydro-quinoxaline-2,3-dione with 2-rnamonphenol by conventional method. Zn (II) and Cd (II) complexes were synthesizedrnfrom mixed the ligand 1,4-dihydro-quinoxaline-2,3-dione derivative ligand with saltsrnof anhydrous Zn(II) nitrate and anhydrous Cd(II) chloride by template method. Theserncomplexes and ligand have been characterized with the help of various spectrarntechnique, such as AAS, IR, UV/VIS spectroscopic techniques as well as molarrnconductance, chloride test and melting point measurements have been done asrnsupports to conclude the structures of the complexes. The square planer geometry wasrnproposed for Zn-L complex and tetrahedron geometry was proposed for Cd-Lrncomplex.

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