In this thesis, two mononuclear polypyridyl complexes of Cu(II), [Cu(tptz)Cl 2 ]·2H 2 O and [Cu(tptz) 2 ](PF 6 ) 2 ·CH 3 CN, (where tptz is 2,4,6-tris(2-pyridyl)-1,3,5-triazine) have been prepared and characterized by elemental analysis, FT-IR and UV-Vis spectroscopies. Solid state structures of both complexes were determined by single crystal X-ray crystallography. The FT-IR spectrum of this complex shows that C=N and C=C bonds shift to higher frequencies in comparison to free tptz ligand. Electronic spectrum of this complex was taken in methanol. The intense absorption bands seen in the UV region are assigned to ligand-centered transitions and a weak absorption band seen in the visible region is assigned to d-d transition. Elemental analysis and ORTEP drawing of this complex shows that [Cu(tptz)Cl 2 ] is crystallized with two water molecules. Air-stable Green crystals of [Cu(tptz) 2 ](PF 6 ) 2 were grown by slow evaporation of an acetonitrile/toluene solution of the complex. In this complex, the tptz ligands are tridentate and linked to the Cu(II) via three N atoms and the CuN 6 entities have compressed octahedral geometry with the shortest Cu-N bonds that form the axial positions. It represents Z-in distortion at 90 K. The shortness of the Cu-N triazine bonds compared with the Cu-N pyridyl bonds is suggested to be due to the stronger ? -accepting properties of the triazine ring. ORTEP drawing and elemental analysis of this complex showed that [Cu(tptz) 2 ](PF 6 ) 2 crystallized with an acetonitrile molecule. The FT-IR spectrum of the complex shows a sharp and intense absorption band around 840 cm -1 for the ? P-F. Catalytic effect of Cu(II) in hydrolysis reaction of tptz was studied. Hydrolysis of aqueous solution of [Cu(tptz)Cl 2 ]·2H 2 O produces the coordination polymer, [Cu(bpca)Cl] n , where bpca i bis(2-pyridylcarbonyl)amido ligand. The [Cu(bpca)Cl] n complex was characterized by elemental analysis, FT-IR and UV-Vis spectroscopies and X-ray crystallography. The structural determination shows that the [Cu(bpca)Cl] n complex is a 1D coordination polymer and the Cu(II) ions are five coordinate with distorted square-pyramidal geometry. A careful iection of the packing pattern in the lattice of the complex reveals that noncovalent interaction of C–H···O type are active in the lattice. The qualitative observation of hydrolysis reaction by UV-Vis spectroscopy in LF region showed an isosbestic point. The presence of this isosbestic point shows that the concentration of intermediate(s) is constant.