Synthesis, Characterization And Catalytic Activity Of Zn-N And Cu-N Complexes

Organometallic chemistry is closely interrelated with materials science, organic synthesis, life science. Metal-complexes occupy an important position in catalytic processes, as the catalysts they have shown high activities in organic reactions and polymerization.Based on full literature research, a series of Zn-N and Cu-N complexes are synthesized and characterized. The relatively novel, simple methods of synthesis of the complexes are established, and their application to catalytic fields is also investigated.The latest progress of Zn-N, Cu-N complexes and their catalytic application is reviewed. The typical synthesis, structural characterization methods of Zn-N and Cu-N complexes are listed and studied. The catalytic application to Henry reaction is systematically summarized, and the mechanism is also proposed.Reaction of o-Diaminobenzene, m-Diaminobenzene, o-Aminobenzylamine, m-Aminobenzylamine andɑ-Pyridylamine with Zn(OAc)2·2H2O and CuCl2·2H2O in alcohol resulted in the production of four novel Zn-N complexes: (Ⅰ)～(Ⅳ), and one novel Cu-N complex: (Ⅴ). The structure of each of the complexes was determined by X-ray diffraction analysis,elemental analysis, 1H NMR, and IR.The complexes were used to catalyze Henry reaction and good catalytic results were achieved. The catalytic activity of the complexes was determined by 1H NMR. Only using 15mol% catalysts without any additives at room temperature, the conversion efficiency for each of these complexes was more than 60%. Among them, (m-Aminobenzylamine)zinc complex was the best catalyst, for which the conversion efficiency was up to 99%.