الفهرس 
Antibacterial activitiesOnly 14 pages are availabe for public view
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Abstract
mal techniques as DTA. and TGA
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3) Measurement of biological activity
iv. Results and discussion
This chapter includes characterization of the ligands and their complexes. N1,N2-bis(2-((Z)- (2-hydroxybenzylidene)amino)phenyl)oxalamide and (Z)-3-((2-((2-hydroxybenzylidene)amino)phenyl)amino)-3,4-dihydroquinoxalin-2(1H)-one were prepared as follow:
1- Preparation of N1,N2-bis(2-aminophenyl)oxalamide: N1,N2-bis(2-aminophenyl)oxalamide was prepared by adding equimolar amount of diethyl oxalate to benzene-1,2diamine in 50 cm3 of absolute ethanol. The mixture was refluxed with stirring on water bath for 2 hours and then left to cool at room temperature, filtered off, washed with distilled water, dried and recrystallized from ethanol.
2- Preparation of Schiff base HL (1): HL, (1) N1,N2-bis(2-((Z)- (2-hydroxybenzylidene)amino)phenyl)oxalamide was prepared by adding equimolar amount of N1,N2-bis(2-aminophenyl)oxalamide to salicyaldehyde in absolute ethanol. The mixture was refluxed with stirring on water bath for two hours and then left to cool at room temperature, filtered off, washed with distilled water, dried and recrystallized from ethanol to afford ligand (1)
3- Preparation of 3-((2-aminophenyl)amino)-3,4-dihydroquinoxalin-2(1H)-one: 3-((2-aminophenyl)amino)-3,4-dihydroquinoxalin-2(1H)-one was prepared by adding equimolar amount of quinoxaline-2,3(1H,4H)-dione to benzene-1,2-diamine in absolute ethanol. The mixture was refluxed with stirring on
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water bath for 2 hours and then left to cool at room temperature, filtered off, washed with distilled water, dried and recrystallized from ethanol.