In this thesis, new palladium complexes were initially synthesized and characterized. The reaction of 3-(dimethylaminomethyl)indole with Pd(OAc) 2 in a 1:1 molar ratio was carried out in toluene at 60°C for 24 h to produce five-membered NC palladacycle [(Pd{? 2 (N,C)-(3-(dimethylaminomethyl)indole)}?-OAc) 2 ] (1) . Also, the reaction of 3-phenylpropylamine with Pd(OAc) 2 by heating in toluene, resulted in nearly square planar complex trans -[Pd(C 6 H 5 (CH 2 ) 3 NH 2 ) 2 (OAc) 2 ]( 2 ). Complex (2) reacted with NaCl in methanol to give corresponding product trans -[Pd(C 6 H 5 (CH 2 ) 3 NH 2 ) 2 (Cl) 2 ]( 3 ). Treatment of 3 with triphenylphosphine in dichloromethane afforded trans -[Pd(C 6 H 5 (CH 2 ) 3 NH 2 ) 2 (PPh 3 ) 2 ]Cl 2 ( 4 ). All the complexes (1–4) of palladium (II) were fully characterized by IR and NMR spectroscopies. In addition, the crystal structures of (2), (3) were determined by single-crystal X-ray diffraction analysis. In these structures, the acetate and chloride ligands are in trans geometry. Palladium nanoparticles derived from complexes ( 1-4 ), were supported on cucurbit[6]uril (CB[6]) and identified by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), inductively coupled plasma analyzer (ICP) and high resolution X-ray powder spectroscopy)HR-XPS). Palladium complex 1 and CB[6]-supported palladium nanoparticles ( 1-4 ) were used as heterogeneous and homogeneous catalysts for Suzuki and Sonogashira cross-coupling reactions and aerobic oxidation of alcohols to corresponding aldehydes or ketones. In the other part of this thesis, palladium chloride and palladium acetate were supported on SiO 2 /KH550/L ( 5, 6 ). These catalysts were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and inductively coupled plasma analyzer (ICP). These heterogeneous catalysts were used forSuzuki and Sonogashira cross-coupling reactions. Importantly, all products were obtained in good or excellent yields.
