Khdair, N.S. et al. 2025. Synthesis, Characterization and Antioxidant study of some Bivalent Metal complexes by N2O2 -donor crown macrocyclic ligand. Journal of Kufa for Chemical Sciences. 4, 2 (Jun. 2025), 537–556. DOI:https://doi.org/10.36329/jkcm/2025/v4.i2.16481.