Modification on Synthesis of Mixed Ligand Chelates by Using Di- and Trivalent Transition Metal Ions with Schiff Base as Primary Ligand

Abstract

New mixed ligand chelates synthesized from di-and trivalent metal ions (Cr, Co, Ni, and Cu ions) and Schiff base (L 1) resulted from the condensation of 4-dimethylaminobenzaldehyde with 2-ami-nophenol as primary ligand, whereas 2-nitroaniline (L 2) represents the secondary ligand in a mo-lar ratio of M:L 1 :L 2 [1:1:1]. The synthesized Schiff base and chelates have been characterized by using several tools, such as, elemental analysis, molar conductivity, magnetic moment measure-ments, infrared and electronic spectra. The mass spectra of the ligands and Ni(II) chelate were used to justify the process of modification, as well as, the electron paramagnetic resonance spec-trum which was carried out for Cu(II) chelate all in order to elucidate the chemical and geometric-al structure of the chelates. On the basis of the obtained data, the geometry of the products was proposed for all the chelates.