Study of Equilibria and Kinetics of the Interactions of Iron(III) with 8-Hydroxyquinoline and 8-Hydroxyquinoline-5-sulfonic Acid in HClO<sub>4</sub>–NaClO<sub>4</sub>Media
作者:Asim Kumar Das
DOI:10.1246/bcsj.65.2205
日期:1992.8
The equilibria and kinetics of the reaction of iron(III) with 8-hydroxyquinoline (oxine) and 8-hydroxyquinoline-5-sulfonic acid under the condition of 1 : 1 chelate formation at different temperatures (35–45 °C) and ionic strength I = 1.0 mol dm−3 (NaClO4 + HClO4) have been studied. A dual path mechanism involving both Feaq3+ and Fe(OH)aq2+ species and the undissociated ligand (LH2+, LH2±) is consistent
铁(III)与8-羟基喹啉(oxine)和8-羟基喹啉-5-磺酸在不同温度(35-45°C)和离子强度下1:1螯合物形成的反应平衡和动力学已经研究了 I = 1.0 mol dm-3 (NaClO4 + HClO4)。涉及 Feaq3+ 和 Fe(OH)aq2+ 物种和未解离配体 (LH2+, LH2±) 的双路径机制与实验条件下的实验观察结果一致。不同的速率常数是由从两个方向达到平衡确定的,即低酸浓度下复合物形成的研究和高酸浓度下复合物分解的研究。发现从这两项研究中获得的结果在实验误差限度内具有可比性。结果符合 kobsd/B = k1[H+] + k2Kh 其中,;Kh = Feaq3+ 的水解常数,k1 和 k2 是 Feaq3+ 和 Fe(OH)aq2+ 的正向二阶速率常数 r...