Synthesis and
characterization of a new macrocyclic ligand and its cobalt(II), copper(II) and
zinc(II) complexes
Hasan Manal Haj and Al-khuder Mohammad Moudar
Res. J. Chem. Environ.; Vol. 29(7); 100-110;
doi: https://doi.org/10.25303/297rjce1000110; (2025)
Abstract
The synthesis of a new ligand, N4 Tetra (Methyl Azomethine)-Diethylene Hydrazide
(TMADEH), was carried out through the condensation of 1,2-diacetylhydrazine with
ethylenediamine. The metal complexes of TMADEH were prepared by reacting ligand
with Co²⁺, Cu²⁺ and Zn²⁺. The structures of the ligand and its complexes were confirmed
using various techniques including FT-IR, UV-VIS, ¹H-NMR, ¹³C-NMR, elemental analysis,
electrical conductivity and atomic absorption spectroscopy.
It was found the ligand acts as a tetra-aza ligand and the metal complexes have
the formulas [Co (TMADEH)Cl2], [Cu (TMADEH)(H2O)2]Cl2 , [Cu (TMADEH)(H2O)2]Cl2 with
metal ratio (1:1) and octahedral structures.
