الفهرس 
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Abstract
A literature survey on transition metal complexes of hydrazones was made. The interest in the study of hydrazones and their metal complexes is mainly due to their biological activities. ?The ligands used in this study are 4acetylpyridine [N(3hydroxy2naphthoyl)]hydrazone (H2APHNH), thiophene2carboxaldehyde [N(3hydroxy2naphthoyl)]hydrazone (H2THNH), salicylaldehyde [(N(3hydroxy2naphthoyl)]hydrazone (H2SHNH), panisaldehyde [(N(3hydroxy2naphthoyl)]hydrazone (H2pAHNH) and ethylacetoacetate[N(3hydroxy2naphthoyl)]hydrazone (H2EHNH). ?The procedures of the preparation of the ligands (H2APHNH), (H2THNH), (H2SHNH), (H2pAHNH) and (H2EHNH) and their metal complexes were described. Elemental analyses, molar conductivities, thermal (TG, DTG), spectral (IR, UVvisible, 1H NMR) and magnetic measurements have been used to characterize the isolated solid complexes. Potentiometric titrations, electrical conductance and antimicrobial activity were carried out. ?In general, three types of solid complexes were isolated in which the ligands may react in neutral, mononegative and/or binegative manner. The exact empirical formulae of the ligands and their metal complexes are proposed on the basis of their elemental analyses results. The isolated complexes are nonelectrolytes in DMSO as shown from the low values of their molar conductivities. The infrared spectral data of the ligands and their corresponding complexes were compared. The changes in characteristic absorption bands of possible coordination sites in the ligands on complexation with the metal ions were noted. The ligands act as neutral monodentate via carbonyl oxygen or neutral bidentate via carbonyl oxygen and azomethine nitrogen or naphthoic hydroxyl group. Also, the ligands may act as mononegative bidentate via hydrazoic carbonyl oxygen and the deprotonated naphthoic hydroxyl group or via azomethine nitrogen and the enolic hydrazoic carbonyl oxygen (=CO). In addition, the ligands may act as mononegative tridentate via azomethine nitrogen, carbonyl oxygen and deprotonated naphthoic hydroxyl group or via azomethine nitrogen, naphthoic hydroxyl group and enolic hydrazoic or ester carbonyl oxygen (=CO). Moreover, the ligands may act as binegative tridentate via zomethine nitrogen, deprotonated naphthoic hydroxyl group, enolic hdyrazoic carbonyl oxygen (=CO). Furthermore, H2EHNH behaves as binegative tetradentate via zomethine nitrogen, hydrazoic carbonyl oxygen, deprotonated naphthoic hydroxyl group, and enolic carbonyl oxygen of ester (=CO). ?The infrared spectra of the ligands referred to intramolecular hydrogen bonding which was confirmed by 1H NMR spectra. Also, the 1H NMR spectra of the diamagnetic Cd(II), Zn(II) and Ni(II) complexes were used to detect the potential coordination sites. ?The electronic spectra and magnetic measurements for the isolated complexes indicate that Co(II) and Cr(III) complexes have octahedralstructure; Ni(II) H2THNH complex has squareplanar structure while the other Ni(II) complexes have octahedral structure; Cu(II) complexes have squareplanar or tetragonally distorted octahedral structure; all Pd(II) complexes have squareplanar structure