A kinetics study of the reactions of OH with several aromatic and olefinic compounds

The reactions of hydroxyl radicals with eight substituted aromatic hydrocarbons and four olefins were studied utilizing the flash photolysis–resonance fluorescence technique. The rate constants were measured at 298°K using either Ar or He as the diluent gas. The values of the rate constants ( k × 10 12 ) in the units of cm 3 /molec. sec are (a) OH + o ‐xylene → products: (12.9±3.8), 20 torr He; (13.0±0.3), 20 torr Ar; (12.4±0.1), 200 torr He; (b) OH + m ‐xylene → products: (15.6±1.4), 3 torr Ar; (19.4±0.8), 20 torr Ar; (21.4±0.2), 20 torr He; (20.3±1.9), 200 torr Ar; (20.6±1.3), 200 Torr He; (c) OH + p ‐xylene → products: (8.8±1.2), 3 torr Ar; (10.1±1.0), 20 torr He; (10.5±0.6), 200 torr He; (d) OH + ethyl benzene → products: (7.50±0.38), 3 torr He; (7.06±0.26), 20 torr He; (7.95±0.28), 200 torr He; (e) OH + n ‐propylbenzene → products: (6.40±0.36), 20 torr He; (5.86±0.16), 200 torr He; (f) OH + isopropylbenzene → products: (7.79±0.40), 200 torr He; (g) OH + hexafluorobenzene → products: (0.221±0.020), 20 torr He; (0.219±0.016) 200 torr He; (h) OH + n ‐propyl pentafluorobenzene → products: (2.52±0.54), 3 torr He; (3.01±0.76), 20 torr He; (3.06±0.24), 200 torr He; (i) OH + propylene → products: (25.6±1.2), 20 torr He; (26.3±1.2), 200 torr He; (j) OH + 1‐butene → products: (29.6±1.9), 3 torr He; (29.4±1.4), 20 torr He; (k) OH + cis ‐2‐butene → products: (43.2±4.1), 3 torr He; (42.6±2.5), 20 torr He; (l) OH + tetramethylethylene → products: (56.9±1.3), 20 torr He.