in the section one of this thesis, one colorful orthopalladate complex (dimer complex) synthesis from reaction between Pd(OAc) 2 and ligand alizarin yellow GG, thene tri-phenyl-phosphin, tri-methyl-pyridine react with [pd{? 2 (C,N) -{5-(3-nitrophenylazo) salicylic acid}}(µ-OAc)] 2 (1) , ti give the monomeric complex Pd [? 3 (N, C, O)-{5-(3-Nitrophenylazo) salicylic acid}] (PPh 3 ) (2) , Pd [? 2 (N, C, O)-{5-(3-Nitrophenylazo) salicylic acid}])(Me 3 Py) (3) , Which synthesized and fully characterized by elemental anlysis and spectroscopic studies (IR and multi nuclear NMR). In second section Three nano catalysts were synthesized and characterized with X-Ray diffraction dispersion, Field Emission Scanning Electron Microscopy(FESEM), Transmission Electron Micrsoscopy (TEM). In the last section,[pd complex(2)/ TiO 2 ] (a) werw used in the sonogashira cross-coupling reaction under aerobic condition.