Synthesis and crystal structure of a dinuclear Cu(II) complex withmultidentate Schiff base ligand

In this research we report synthesis, characterization, crystal structure and spectroscopicproperties of a new dinuclear copper(II) complex with polyamines ligand. The complex wassynthesized by the reaction of Cu(NO۳)۲.۳H۲O and multidentate Schif base ligand (H۴L) andsodium azide in methanol solvent. The reaction mixture was heated to reflux for ۱۲ hours and thegreen precipitates were obtained. The resutling precipitates were filtered off and washed withcold methanol and finally dried in air. The complex was characterized by FT-IR and UV-Visspectroscopic methods and elemental analysis. Comparing FT-IR spectrum of complex with freeligand (see Fig. ۱) confirmed the coordination of both azide and Schiff base ligands to the metalion. The strong peak at ۲۰۳۸ cm-۱ is related to azide ligand [۱] and the band located at ۱۶۰۰ cm-۱is related to the C=N group of Schiff base ligand [۲]. The single crystals of this complex wasobtained in methanol by slow solvent evaporating during one week. Structural studies indicatedthat a dinucelar structure has been obtained and its general formula is ]Cu۲(L′۱)(N۳)۲] where H۴Lis ۲,۲'-{ethane-۱,۲-diylbis[۳-(۲-{[(۱E)-(۲-hydroxyphenyl)methylene]amino}ethyl)imidazolidine-۱,۲-diyl]}diphenol. H۴L, is coordinated to the Cu(II) ion as (H۲L)۲- ligand by elimination of twophenolic hydrogen during the formation of complex

کلیدواژه ها:

Cu complex ، Crystal structure ، Spectroscopic studies