Synthesis and Characterization of New Hydrazone Derivatives Fe(II), Co(II), Ni(II) and Cu(II) Complexes

N-((2-hydroxynaphthalen-1-yl)methylene)nicotinohydrazide ligand derived from the condensation reaction of 2-hydroxynaphthaldehyde and nicotinic hydrazide was obtained. New hydrazone metal complexes L2Fe, L2Co, L2Ni and L2Cu2 were synthesized from the reaction of N-((2-hydroxynaphthalen-1-yl)methylene)nicotinohydrazide ligand and Fe(II), Co(II), Ni(II) and Cu(II) acetate salts in a 2:1 stoichiometric ratio, respectively. The synthesized compounds were characterized by techniques such as FT-IR, NMR (ligand only), UV-Vis, elemental analysis, molar conductivity measurement, magnetic susceptibility. Magnetic susceptibility measurements were recorded as 5.96 BM, 1.03 BM, 1.08 BM and 1.61 BM for the L2Fe, L2Co L2Ni and L2Cu2 complexes, respectively. It has been determined that the L2Cu2, L2Ni and L2Co complexes have antiferromagnetic properties. The L2Fe, L2Co and L2Ni complexes have octahedral geometry, while the L2Cu2 complex has a square plane geometry. The molar conductivity values of the complexes are between 1.31-2.61 μS/cm and do not have conductivity properties.