الخلاصة

ABSTRACT Objective: Series new organic compounds were synthesized and identified in our paper via types of reactions represented by condensation reaction, alkylation reaction, and cyclization reaction. Methods: Preparation of many compounds through various reactions which studied several applications such as liquid crystal (LC), differential scanning calorimetry (DSC)-measurement, complexation with ion Pb, and other chemical studies such as conditions of complex. Results: The structure of the newly compounds were investigated using thin-layer chromatography-plate and many techniques (Fourier transforminfrared, 1H nuclear magnetic resonance, ultraviolet-visible, determination of optimal conditions, ratio of ligand:metal [L: M], molar conductivity measurements, some physical characterization) then studying the biological activity of compounds. Conclusion: All compounds appeared application in LC, as ligands with lead ion Pb (II), it gave mole ratio of L:M (1:1) as a complex, they have been appeared high stability in DSC-measurements and gave good activity in biostudying against bacteria.