M. Hynes, Dermot F. Kelly
Sep 15, 1991
Citations
0
Influential Citations
4
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract The equilibria and kinetics of the reactions of iron(III) with heptane-2,4,6-trione (H2hto), 1-phenylhexane- 1,3,5-trione (H2phto) and 1,5-diphenylpentane-l,3,5-trione (H2dppto) have been investigated in methanol-water (70:30 vol./vol.) solution at 25 °C and ionic strength 0.5 mol dm−3. The hydrolysis reactions of Fe3+ and [Fe(Hhto)]2+ have also been investigated under the same conditions. A mechanism is proposed which accounts satisfactorily for the kinetic data. Fe3+ reacts with the fully protonated forms of H2hto, H2phto and H2dppto with rate constants of 110, 97.4 and 61.9 mol−1 s−1, respectively, while Fe(OH)2+ reacts with the fully protonated forms of H2hto, H2phto and H2dppto with rate constants of 1.86 x 103, 1.13 x 103 and 0.910 x 103 dm3 mol−1 s−1, respectively.