Coordination compounds, with bonds between a central metal atom and surroundingrnligands, play critical roles in biology, biochemistry and medicine, controlling the structure andrnfunction of many enzymes and their metabolism. They play similarly vital roles in manyrnindustrial processes and in the development of new materials with specifically designedrnproperties. Thus synthesis and study of such complexes is very important.rnIn this lab work, equimolar quantities of o-phenyldiamine and oxalic acid dihydrate wererncondensed in 5N HCl under reflux to 2,3-quinoxalinedione. Refluxing of 2,3-quinoxalinedionernwith phosphorus (V) chloride as well as with thionylchloride gave 2,3 dichloroquinoxaline whichrnwas then treated first with hydroxylamine hydrochloride to afford a new ligand 2,3-rnquinoxalinedioxime (QXDO) and secondly with N-(aminoformimidoyl)phenol to givernquinoxaline-2,3-bis-[N-(aminoformimidoyl)phenol] (QXAP) both of which contain nitrogen andrnoxygen donor atoms. However, the formation of QXAP was unsuccessful as it was confirmed byrn1H NMR. Thus QXDO was further complexed with divalent metal salts to give differentrncomplexes. New metal complexes of nickel and copper with quinoxalinedioxime (QXDO) werernprepared. The complexes were characterized by elemental analysis, conductance measurements,rnatomic absorption, IR, NMR and UV spectroscopy and magnetic moments. QXDO behaves as arnbidetate ligand.rnKey terms: Quinoxaline, o-phenyldiamine, salicylaldehyde, hydrazine, 2,3-quinoxalinedionern(QXD), 2,3-dichloroquinoxaline (DCQX), 2,3-quinoxalinedioxime (QXDO).