Abstract
The thermal decomposition of [Co(3-OHpy)
4Cl
2] and [Ni(3-OHpy)
4Cl
2] was carried out using TG, DTG and DSC methods. The intermediate and residue for each decomposition stage were identified from TG curves. The kinetics and mechanism of the ligand degradation for each complex were established. The kinetic parameters
E,
A and Δ
S were calculated from the TG curves using mechanistic and non-mechanistic integral equations. For both complexes the three-dimensional diffusion
D
3 mechanism (Jander equation) controls the process of degradation, followed by the random nucleation mechanism for the second stage. The heat of reaction Δ
H
Total
was determined using the DSC curves.