الفهرس 
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Abstract
The present thesis includes, the preparation of Zn(Il), Cu(lI), Ni(Il),
Co(IJ) and mixed Co(IJ)-Ni(JJ) complexes of nicotinic as well as isonicotinic
acids. Also, it deals with the study of kinetic of thermal decomposition, DC—
and AC-electrical conductivity, dielectric constant, dielectric loss and
magnetic properties of these acids and their complexes.
The thesis comprises three chapters:
Chapter I: Deals with the introduction and literature survey on the
previous studies which were carried out on the complexes of nicotinic as well
as isonicotinic acids. Also, it contains the aim of work and theoretical
principle underlying the methods used in the present study.
Chapter II: Is divided into two parts: The first part covers the
experimental part, including the instruments used, materials and preparation
of the pure and mixed complexes.
The second part of this chapter is concerned with the characterization
of the investigated samples using elemental analysis, FT-JR and thermal
analysis (DTA-TG).
The FT-JR spectra indicate the participation of both nitrogen and
oxygen atoms in cdmplex formation and the thermal stability was found to
decrease for nicotinic acid and their complexes in the order:
Nicotinic acid> Cobalt-nickel nicotinate> Cobalt nicotinate > Zinc
nicotinate > Nickel nicotinate > Copper nicotinate