Elaboration, characterization and multiple properties Of new complexes based on 5-bromosalicylaldehyde

Abstract

Three series of Schiff base ligands were synthesized by a 5-bromo-2-hydroxybenzaldehyde condensation reaction with three different amines. The structural determinations were identified using UV-vis, FT-IR and 1H ,13C spectroscopic analysis. The products were obtained with excellent yields. Prepared Schiff bases have been used as tetradentate and bidentate ligands to coordinate Co(II), Cu(II), Mn(II) and Zn(II) that lead to complexes with a metal/ligand ratio of 1:1 and 1:2. The electrochemical properties of metal complexes were conducted by cyclic voltametry in DMF. The molecular structure of the single crystals obtained for certain compounds was also determined by the DRX diffraction technique on single crystals. Hirshfeld’s surface analysis provided information about the existing interactions in the structure of the two products, and helped to view and understand its crystalline stacking. Theoretical calculations using the Functional Theory of Density (DFT) method were performed. The investigation of non-linear optical properties on the ligand (H2L2) shows a good answer. investigations carried out on the antioxidant capacities of our products were made from in-vitro experiments against the free radicals DPPH and ABTS