Thermal Degradation Behaviour of Ni(II) Complex of 3,4‐Methylenedioxaphenylaminoglyoxime

Abstract

Thermal degradation behaviour of the Ni(II) complex of 3,4-methylenedioxaphenylaminoglyoxime was investigated by TG, DTA, and DTG at a heating rate of 10°C min−1under dinitrogen. The acquired experimental data shows that the complex is thermally stable up to 541 K. The pyrolytic decomposition process occurs by melting metal complex and metal oxide remains as final product. The energies of the reactions involved and the mechanism of decomposition at each stage have been examined. The values of kinetic parameters such as activation energy (E), preexponential factor (A) and thermodynamic parameters such as enthalpy (ΔH), entropy (ΔS), and Gibbs free energy (ΔG) are also evaluated.

Novel cadmium (II) N2O2‐Schiff base compounds: X‐ray crystal structure, Hirshfeld surface study, thermal behavior, antimicrobial, DNA cleavage power, antioxidant, and cytotoxicity activity

“…mol À1 indicate good thermal stability for them. The negative values of ΔS* in all thermal stages confirm the unusual thermal degradation of the compounds suggesting disorderly in all decomposition processes of them at the ratedetermining steps are reduced and also the reactions are non-spontaneous and slower than normal ones 75,76. Furthermore, the positive values of ΔH* (10.87-115.79 kJ.…”

Structural and bio-catalytic aspects of nano crystallite iron(iii) complexes containing triazole-based ligands

“…(iii) Negative values of DS* (Table 3) indicate that the studied pyrolysis reactions are slow and the order of the reactants is lower than that of the activated intermediates. 36 It should be noted here that the negative sign of DS* can be traced back to the low value of A and possibly due to the non-spontaneous behavior of the studied pyrolysis steps. 37 This interpretation is consistent with the positive sign of the calculated DG* values for the three successive pyrolysis steps of the present iron(III) complexes.…”

Synthesis of Some Novel Nanosized Chelates of Anchoring Bisazo Dye 5-[5-(4,6-Dioxo-2-thioxo-hexahydro-pyrimidin-5-ylazo)-naphthalen-1-ylazo]-2-mercapto-1H-pyrimidine-4,6-dione and Their Applications as Antioxidant and Antitumor Agents

“…The thermograms of all investigated compounds are demonstrated in Figure . The DTG curves of the ligand and its metal chelates were examined by the following rate equation where n and α are the reaction order and the decomposed fraction, respectively. K is the rate constant which is calculated by the Arrhenius equation: K = A e – E */( RT ) , where A , E *, R , and T are the frequency factor, activation energy, molar gas constant, and temperature (kelvin), respectively.…”