Abstract

Herein we report two mononuclear nickel and Copper complexes of a tridentate 2, 4-dichloro-6-{[(5-chloro-2-hydroxyphenyl)imino]methyl}phenol ligand (dcp) derived from 3,5-dichlorosalicylaldehyde and 2-amino-4-chlorophenol [general formula: ML.xH₂O {L= dcp; M = Ni^II and Cu^II }]. The synthesized compounds have been characterized by elemental; FT-IR, UV-Vis, molar conductance and thermal analysis studies. TGA analysis was performed to determine the thermal stability of synthesized compounds under nitrogen atmosphere up to 800 ^?C K at 10 ^?C min^-1 heating rate. Thermal studies show the degradation pattern of complexes. Non-isothermal kinetic parameters, such as activation energy (E*), entropy of activation (ΔS*), enthalpy of activation (ΔH*), frequency factor (Z) and free energy change (ΔG) have been calculated using Coats-Redfern (C-R), Piloyan-Novikova (P-N) and Horowitz-Metzger (H-M) methods.

Keywords

Schiff base, Nickel and Copper complexes, Thermal analysis, Non-isothermal kinetics, Coats-Redfern methods