Abstract
Schiff-base ligand, 2,6-bis(benzimino)-4-phenyl-1,3,5-triazine (L), and its transition metal complexes of Co(
), Ni(
), and Cu(
) were synthesized by refluxing the reaction mixture and its analytical, spectral, and thermogravimetric characteristics were explored by various techniques: AAS, FT-IR, UV-vis, TG-DTG, CHNS/O, and VSM. It was observed that all the metal containing complexes are non-electrolytic, mononuclear, and paramagnetic in nature, confirmed by the molar conductance and magnetic susceptibility measurements. Optical spectral data were used to investigate the geometrical and spectral parameters of [Co(L)(ac)
], [Ni(L)(ac)
], [Cu(L)(ac)
], [Cu(L)(acac)
], and [Cu(L)(fmc)
] complexes. Simultaneous thermal analyses (TG-DTG) in nitrogen atmosphere reveal that the ligand decomposes in one step, [Co(L)(ac)
], [Ni(L)(ac)
], and [Cu(L) (ac)
] complexes are decomposed in three steps, whereas [Cu(L)(acac)
] and [Cu(L) (fmc)
] are decomposed in five and two steps, respectively. In addition, activation energy (
) and pre-exponential factor (ln
) were evaluated by TG-DTG decomposition steps of compounds using the Coats–Redfern formula. Enthalpy (∆
), entropy (∆
), and Gibbs free energy (∆
) of the as-prepared metal complexes were also speculated by various thermodynamic equations.