Abstract
Arrhenius parameters for the reaction of hydrogen atoms with ethanol, ethanol-d5, 2-propanol, and 2-propanol-d7 in aqueous solution have been determined by the use of pulse radiolysis and electron paramagnetic resonance free induction decay attenuation measurements. At 25.0 °C, the calculated rate constants for these compounds are (2.04 ± 0.06) × 107, (2.77 ± 0.26) × 106, (1.01 ± 0.07) × 108, and (1.56 ± 0.07) × 107 dm3 mol-1 s-1, respectively, with corresponding activation energies of 24.10 ± 0.50 (6.5−81.3 °C), 31.9 ± 1.2 (22.4−79.6 °C), 22.00 ± 0.26 (5.4−88.5 °C), and 27.45 ± 0.30 (5.7−86.5 °C) kJ mol-1. The results of this study are compared to previous reports and ab initio calculations.
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