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The synthesis of the Schiff bases involved refluxing equimolar
amounts of the appropriate benzaldehyde with the respective
thiosemicarbazide, aryl hydrazide or dithiocarbazate, in ethanol.
After 4 h, precipitated products were isolated. If no precipitate
was formed, the products were obtained after partial
evaporation of the solvent or precipitation with a minimum
amount of water. The Schiff bases were washed with ethanol
and dried in vacuo.

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