Synthesis, Spectral, Thermal and DPPH Scavenging Studies of the Hydrazone Derived Transition Metal Complexes

• Published in: Journal of the Chemical Society of Pakistan 2020, Vol.42 (6), p.888-888
• Main Authors: Muhammad Ikram, Muhammad Ikram, Sadia Rehman, Sadia Rehman, Muhammad Ayaz, Muhammad Ayaz, Syed Muhammad Salman, Syed Muhammad Salman, Farzia, Farzia, Muhammad Imran, Muhammad Imran, Mutasem Omar Sinnokrot, Mutasem Omar Sinnokrot, Farman Ullah, Farman Ullah, Bushra Khan, Bushra Khan
• Format: Article
• Language: English
• ISSN: 0253-5106
• DOI: 10.52568/000691/JCSP/42.06.2020

Schiff base ligand 2,2-{benzene-1,4-diylbis[(E)methylylidene(1E,2E)hydrazine-2,1-diylidene(E)methylidene]}diphenol (H2-BHMD) was synthesized by reacting together the ortho vaniline and 1,4-bis(hydrazonomethyl)benzene. It was characterized by analytical and spectroscopic techniques including 1H-NMR, elemental analysis, FT-IR, and UV-Visible studies. Different transition metal ions like Co (II), Ni (II), Cu (II) and Zn (II) were reacted with well characterized ligand to obtain the metal derivatives. AAS, elemental analysis, FT-IR, molar conductance and UV-Visible methods were used to study the metal complexes. The analytical and spectroscopic technique suggested the formation of coordination polymers. The FT-IR results confirmed the bidentate binding of the ligand involving phenolic oxygen and azomethine nitrogen. The UV-visible studies suggested the formation of distorted square planar geometries for all the metal complexes. Hydrazone Schiff bases are known for their antioxidant activity, therefore the synthesized hydrazone and the corresponding metal complexes were also studied for their antioxidant capabilities utilizing DPPH free radicals. Among all complexes, the Co-BHMD demonstrated noteworthy percent hindrance to the free radicals, yet much lower than the standard medication utilized. The metal subsidiaries were likewise studied for their thermal degradation. The respective TG bands were utilized for dynamic and thermodynamic parameters estimation utilizing Horowitz-Metzger strategy.