Kinetics on Thermal Decomposition of Iron(III) Complexes of 1,2-Bis(Imino-4’-Antipyrinyl)Ethane with Varying Counter Anions

• 作者: Fikre Elemo Madhu Thomas Mamo Gebrezgiabher Tesfay Gebretsadik Yosef Bayeh
• 来源期刊: 化学工程与科学期刊(英文)
• 学科: 化学
• 关键词: Iron(III) COMPLEXES 1 2-Bis(Imino-4’-Antipyrinyl)Ethane Thermal Decomposition KINETICS
• 年，卷（期）: 2019,（1）
• 页码范围: 1-10
• 页数: 10页
• 分类号: O6

摘要

A comparative thermal decomposition kinetic investigation on Fe(III) complexes of a antipyrine Schiff base ligand, 1,2-Bis(imino-4’-antipyrinyl)ethane (GA)), with varying counter anions viz. CIO4-, NO3-, SCN-, Cl-, and Br-, has been done by thermogravimetric analysis by using Coats-Redfern equation. The kinetic parameters like activation energy (E), pre-exponential factor (A) and entropy of activation (ΔS) were quantified. On comparing the various kinetic parameters, lower activation energy was observed in second stage as compared to first thermal decomposition stage. The same trend has been observed for pre-exponential factor (A) and entropy of activation (ΔS). The present results show that the starting materials having higher activation energy (E), are more stable than the intermediate products, however;the intermediate products possess well-ordered chemical structure due to their highly negative entropy of activation (ΔS) values. The present investigation proves that the counter anions play an important role on the thermal decomposition kinetics of the complexes.