Synthesis of new palladium-phosphine-hydrazone complexes and investigation of catalytic activities on suzuki coupling reactions

Electronic structures, solubility properties, coordination numbers, etc. of catalysts many variables, can be designed in a planned manner and changes can be made in the activity of the catalyst. In addition, advantages such as time, energy, cost, efficiency and selectivity provided by catalysts are used in at least one step of the production of many chemicals. Palladium complexes are often used in this coupling type among the catalysts, which is called Suzuki carbon-carbon (C-C) coupling reactions. In this thesis, (E)-1-(2,4-dinitrophenyl)-2-(2-(diphenylphosphaneyl)benzylidene)hydrazine, (E)-1-(4-bromophenyl)-2-(2-(diphenylphosphaneyl)benzylidene)hydrazine and (E)-1-(4-metyl)-2-(2-(diphenylphosphaneyl)benzylidene)hydrazine ligands and their palladium complexes were synthesized, their structures were characterized by various spectroscopic methods (Elemental Analysis, Fouirer Transform Infrared Spectrophotometer, Nuclear Magnetic Resonance, UV-Vis Spectrophotometer ve Magnetic Sensitometri) and the catalytic activities of the complexes were tested in the Suzuki-Miyaura type C-C coupling reaction. As a result of this reactions, while substrate/catalyst ratio was 50, at 80 °C, in the 1st catalyst 98.7% product conversions were obtained on the basis of Cs2CO3 in acetonitrile solvent on the 1-bromo-4-nitrobenzene substrate, in the 2nd catalyst 99.4% product conversions were obtained on the basis of Cs2CO3 in acetonitrile solvent in bromobenzene substrate, in the 3rd catalyst, 98.1% product conversions were obtained on the basis of NaOH in the DMF solvent on the bromobenzene substrate.