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Kinetics And Mechanism of The Non-isothermal Decomposition. Some Ni(II)-carboxylate-imidazole ternary complexes

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Abstract

The thermal decomposition of some Ni(II)-carboxylate-imidazole complexes in a nitrogen atmosphere was studied non-isothermally. From the non-isothermal thermoanalytical data, it was found that these complexes decompose through a stepwise release of imidazole molecules and/or CO ones forming unstable intermediates which produce metal oxide or the metal as a final decomposition product. TG in conjunction with DTG were used to evaluate the kinetic and thermodynamic parameters of the decomposition reaction. The kinetic studies were performed employing a computer-oriented kinetic analysis of each set of W-T data obtained under constant heating rate. The diffusion processes are the decisive mechanisms for the decomposition. The values of ΔE, A, ΔH, ΔS and ΔG for activation were calculated for the complexes and correlated to variation in their structure.

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Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Minia University, Minia, Egypt

    E. M. Abd Alla & M. I. Abdel-Hamid

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  1. E. M. Abd Alla
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  2. M. I. Abdel-Hamid
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Abd Alla, E.M., Abdel-Hamid, M.I. Kinetics And Mechanism of The Non-isothermal Decomposition. Some Ni(II)-carboxylate-imidazole ternary complexes. Journal of Thermal Analysis and Calorimetry 62, 769–780 (2000). https://doi.org/10.1023/A:1026789828387

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