التفاصيل البيبلوغرافية
| العنوان: |
Kinetics of the reaction of ferrous ions with hydroxyl radicals in the temperature range 25–300 °C. |
| المؤلفون: |
Barr, Logan, Conrad, Jacy K., McGregor, Christine, Perron, Randy, Yakabuskie, Pamela A., Stuart, Craig R. |
| المصدر: |
Physical Chemistry Chemical Physics (PCCP); 2/7/2024, Vol. 26 Issue 5, p4278-4283, 6p |
| مستخلص: |
The kinetics and mechanism of the reaction between OH radicals and ferrous ions in the temperature range 25–300 °C were studied using pulse radiolysis. At temperatures <150 °C the rate of reaction is essentially independent of temperature, while at temperatures >150 °C the activation energy is 45.8 ± 3.0 kJ mol−1. The change in activation energy is attributed to a change in the dominant mechanism from hydrogen atom transfer (HAT) to dissociative ligand interchange. The kinetic isotope effect (KIE) was measured by repeating experiments in heavy water. A value of 2.9 was measured at room temperature where HAT is the dominant mechanism. The KIE decreases to zero at temperatures > 150 °C as ligand interchange becomes dominant and the O–H bond is no longer involved in the reaction. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
