Synthesis and identification of five.six and seven membered ring 0f heterocyclic derivativese

        Benzylidene compounds (Schiff bases),were prepared from the reaction of 2-hydroxy benzaldehyde with different primary amines,and elucidated by infrared spectroscopy.Ferric sulfate di-hydrate salt was reacted with those Schiff bases which produced the corresponding ferric complexes.These obtained complexes were elucidated by infrared spectroscopy and metal analysis.The prepared compounds were tested for antibacterial activity.The results obtained indicated that some of these compounds were more active than the others.And the biological activity included two types of bacteria, gram positive bacteria(Staphylococcus aureus) and gram negative bacteria(Escherichia