Mixed ligands of (E)-1-(3-(((1H-1,2,4-triazol-3-yl)imino)methyl)-4-hydroxy-5- methoxyphenyl)ethan-1-one and chloroanilic acid: Synthesis, characterization and thermal stability study

Abstract

The present work involved the synthesis, characterization and thermal study of metal complexes of Co(II), Cu(II), Ni(II) and Zn(II) derived from mixed ligands;HL¹: (E)-1-(3-(((1H-1,2,4-triazol-3-yl)imino)methyl)-4-hydroxy-5-methoxyphenyl)ethan-1-one and H₂L²: 2,3-dichloro-5,6-dihydroxycyclohexa-2,5-diene-1,4-dione.  The new ligands and their metal complexes were fully identified on the basis of FT-IR, EI-MS, NMR, UV-Visible spectroscopy, molar conductivity and magnetic susceptibility measurements. The new metal complexes were prepared in their solutions in ethanol and in solid state with respect 1:1:1 mole ratio of M:L¹ : HL². As well as the elemental microanalysis was carried out to confirm the skeletal structure of the metal complexes. The physicochemical properties such as melting point, magnetic susceptibility and molar conductivity at room temperature were determined. The spectral data of IR, UV-Visible spectra and magnetic moments revealed the formation of octahedral environment around Co(II), Ni(II), Cu(II) and Zn(II) ions. As well as the TG-DTA measurements confirmed the thermal stability due to the cleavage of weak points in the skeletal structures of metal complexes.

KEY WORDS: (E)-1-(3-(((1H-1,2,4-triazol-3-yl)imino)methyl)-4-hydroxy-5-methoxyphenyl)ethan-1-one, Thermal stability of apocynin, Thermal stability of mixed ligands

Bull. Chem. Soc. Ethiop. 2025, 39(8), 1549-1558.                                                        

DOI: https://dx.doi.org/10.4314/bcse.v39i8.8