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Thermal decomposition study on mixed ligand thymine complexes of divalent nickel(II) with dianions of some dicarboxylic acids

✍ Scribed by Iman T. Ahmed

Publisher: Elsevier Science
Year: 2007
Tongue: English
Weight: 350 KB
Volume: 80
Category: Article
ISSN: 0165-2370
DOI: 10.1016/j.jaap.2007.04.006

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✦ Synopsis

Thermal decomposition of mixed ligand thymine (2,4-dihydroxy-5-methylpyrimidine) complexes of divalent Ni(II) with aspartate, glutamate and ADA (N-2-acetamido)iminodiacetate dianions was monitored by TG, DTG and DTA analysis in static atmosphere of air. The decomposition course and steps of complexes

were analyzed. The final decomposition products are found to be the corresponding metal oxides. The kinetic parameters namely, activation energy (E*), enthalpy (DH*), entropy (DS*) and free energy change of decomposition (DG*) are calculated from the TG curves using Coats-Redfern and Horowitz-Metzger equations. The stability order found for these complexes follows the trend aspartate > ADA > glutamate.

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