Fourier Transform Infrared Study of the Kinetics and Mechanisms for the Cl-Atom and HO-Radical-Initiated Oxidation of Glycolaldehyde

Article abstract of DOI:10.1021/j100292a038

The Cl-atom and HO-radical-initiated oxidation of CH2(OH)CHO was studied by the FTIR spectroscopic method in the steady-state photolyses (λ ca./= 300 nm) of mixtures containing ppm concentrations of CH2(OH)CHO and Cl2 and CH2(OH)CHO and C2H5ONO, respectively, in 700 Torr of N2-O2.HCHO and CHO-CHO were observed as major initial products inboth the Cl and OH teactions.In the presence of added NO2, the former product was partially replaced by a transient species identified as CH2(OH)C(=O)OONO2, while the CHO-CHO yield remained unchanged.The result are consistent with CH(OH)CHO radical, i.e., CH2(OH)CHO + Cl (or OH)> -> CH2(OH)C(=O) radicalical and = HCl (1a), CH2(OH)CHO + Cl (or OH) > CH(OH)CHO + HCl (1b).Values for k_1b/1a = k_1b> were determined to be 0.35 and 0.22 for the Cl and OH reactions, respectivly.Relative rate constants of kk = 0.9 and k/k = were also obtained.