Synthesis and characterizationof macroacyclic Schiff-base ligand containing one mopiperazine moiety and its Zn(II) complex

The Schiff base ligand (H2L) by potentially N6O2 donor systemhas been prepared from condensation of 2-hydroxybenzaldehyd with polyamin(A). IR spectrum of ligand exhibitsa (C=N) vibration in 1634 cm-1.The mass spectrum of ligand (H2L) shows the peak at 647 m/z that confirms the synthesis ligand. In the 1H-NMR spectrum of ligand the signal for the imine proton appears at 8.53 ppm. Also the signal for the hydroxyl protons appears at 13.8 ppm. The spectrum of amine proton removed that confirm the synthesize reaction of Schiff base ligand has completed. From direct reaction of this ligand and Zn(II) metal ion,the macroacyclic Schiff-base complex [Zn(H2L)]was synthesized.IR spectrum of complex exhibit a (C=N) vibration in 1611 cm-1.The mass spectrum of ligand (H2L) shows the peak at 755 m/z that confirms the synthesis ligand. In the 1H-NMR spectrum of ligand the signal for the imine proton appears at 8.64 ppm, also the signal for the hydroxyl protons appears at 13.7 ppm. The results of elemental analysis confirms the synthesis of ligand and complex [1,2].