Synthesis and Characterization of Co (II), Ni (II) and Cu (II) Complexes via Schiff Base Derived from Dithiooxamide and Salicylaldehyde


The first part of this work was to optimize the synthesis of a Schiff base( N,N'-bis (2-hydroxybenzlidene) dithiooxamide (LH)) derived from the reaction between the dithiooxamide with salicyldehyde. The reaction was reflexed for 6 hours at 70 ºC. Three types of complexes were synthesized using metal of ions cobalt (II), nickel (II) and copper (II).The second part was to characterization of prepared compounds and study the properties of these compounds. Infrared spectroscopy (FT-IR) ,NMR-spectroscopy, UV- Visible spectroscopy and Atomic absorbtion were used to identify the structure of the compounds. The magnetic susceptibility was measured; magnetic moment of cobalt (II) complex was 2.82 B.M, magnetic moment of nickel (II) complex was dimagnatic and copper (II) complex was 1.67 B.M. Conductivity of complexes were measured using DMSO as a solvent where conductivities of complexes were ionic in ratio (1:1) of Co(II) complex while non-ionic of Ni(II) and Cu(II) complexes. Lastly, CHNS elemental analysis technique was used to identify and determine the amount of elements that are present in a ligand.