Fourier Transform Infrared Studies of the Self-Reaction of C2H5O2 Radicals

Article abstract of DOI:10.1021/j100216a023

Product studies were made with the FT IR method in the photooxidation of C2H5N2C2H5 and in the Cl-atom initiated oxidation of C2H6 in O2-N2 mixtures at 700 torr and 298 K.The major products were CH3CHO, C2H5OH, and C2H5O2H in both systems.A weak, broad band centered at 1040 cm^-1 was assigned tentatively to C2H5O2C2H5.The results are consistent with the occurrence of three channels for the self-reaction of C2H5O2 radicals, i.e., 2C2H5O2<*>2C2H5O+O2 (a), CH3CHO+C2H5OH+O2 (b), C2H5O2C2H5+O2 (c), followed by the secondary reactions C2H5O+O2<*>CH3CHO+HO2, HO2+C2H5O2<*>C2H5O2H+O2, and 2HO2<*>H2O2+O2.The ratios of the rate constants for reactions a-c were determined to be k_a/k_b=1.3 and k_c/k_b<=0.22.