RATE OF HYDROGEN-ATOM REACTION WITH ETHANOL, ETHANOL-D(5), 2-PROPANOL, AND 2-PROPANOL-D(7) IN AQUEOUS-SOLUTION

Arrhenius parameters for the reaction of hydrogen atoms with ethanol, ethanol-d(5), 2-propanol, and 2-propanol d(7) in aqueous solution have been determined by the use of pulse radiolysis and electron paramagne tic resonance free induction decay attenuation measurements. At 25.0 d egrees C, the calculated rate constants for these compounds are (2.04 +/- 0.06) x 10(7), (2.77 +/- 0.26) x 10(6), (1.01 +/- 0.07) x 10(8), a nd (1.56 +/- 0.07) x 10(7) dm(3) mol(-1) s(-1) respectively, with corr esponding activation energies of 24.10 +/- 0.50 (6.5-81.3 degrees C), 31.9 +/- 1.2 (22.4-79.6 degrees C), 22.00 +/- 0.26 (5.4-88.5 degrees C ), and 27.45 +/- 0.30 (5.7-86.5 degrees C) kJ mol(-1). The results of this study are compared to previous reports and ab initio calculations .