Kinetics and thermal decomposition of Fe(III) and UO₂(II) complexes with embelin (2,5-dihydroxy-3-undecyl-P-benzoquinone)

Abstract

The thermal decomposition of the complexes: [Fe(C₁₇H₂₄O₄)_1.5·2H₂O]_n and [UO₂(C₁₇H₂₄O₄·2H₂O]_n, and evaluation of kinetic parameters (E, Z and ΔS) by making use of Piloyan-Novikova, Coats-Redfern and Horowitz-Metzger equations are reported. The complexes are found to decompose in three well defined steps involving random nucleation mechanism. The intermediates formed during decomposition usually undergo further decomposition without remaining stable over a considerable range of temperature.