Spectroscopic studies, thermal and catalytic activity toward dye decolorization of some new metal complexes

Abstract

The current study aim to investigate the reaction of ligand 6,6'(([1,1'biphenyl]4,4'diylbis(azaneylylidene))bis (methaneylylidene))bis(2,4-dichlorophenol (H2L) with the some transition metal ions such as Co(II), Ni(II) and Cu(II) and with some metal hexacarbonyls M(CO)6 (M= Cr, Mo and W). Schiff base ligand (H2L) and its complexes are characterized by elemental analysis, spectroscopic studies such as IR, UV-vis, 1H NMR, mass, molar conductance, magnetic susceptibility measurements and thermal analysis. Three complexes with molecular formulas [Co2(H2L)(H2O)4Cl4], [Ni2(H2L)(H2O)4Cl4] and [Cu2(H2L)2Cl4].3H2O are isolated from the reaction of metal ion with H2L. The ligand acted as tetradentate in all prepared complex. Conductance data shows that all the metal ion complexes are non-electrolytes. The IR spectrum of ligand exhibits characteristic bands due to OH, (C-O) and azomethine group (C=N). The band of azomethine is shifted in the spectra of complexes to lower frequencies due to complex formation. Non-ligand