Synthesis, characterization, thermal and non-isothermal degradation studies of two mononuclear nickel and copper complexes containing schiff base moiety

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 = NiII & CuII }]. 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 (∆S*), enthalpy of activation (∆H*), frequency factor (Z) and free energy change (∆G) have been calculated using Coats-Redfern (C-R), Piloyan-Novikova (P-N) and Horowitz-Metzger (H-M) methods.