| Abstract: | Rate constants for the gas‐phase reactions of hydroxyl radicals and chlorine atoms with a series of alcohols have been determined by using the relative method. The experiments were performed at 295 ± 2 K and at 1 atmospheric pressure. The obtained values of the rate constants in units of 10?12 cm3 molecule?1 s?1 are as follows: | Alcohol | Rate Constants for OH with | Rate Constants for Cl with | | Propane | Cyclohexane | Propane | Cyclohexane | | Ethyl alcohol | 3.40 ± 0.25 | – | 103 ± 4 | 96 ± 7 | | n‐Propyl alcohol | 5.47 ± 0.44 | – | 153 ± 13 | 147 ± 11 | | Isopropyl alcohol | 5.31 ± 0.39 | – | 73.5 ± 3.7 | 82.7 ± 7.4 | | n‐Butyl alcohol | 8.66 ± 0.66 | – | 211 ± 11 | 223 ± 10 | | Isobutyl alcohol | 9.08 ± 0.35 | 9.59 ± 0.45 | 182 ± 4 | 196 ± 11 | | tert‐Butyl alcohol | 1.11 ± 0.07 | – | 31.5 ± 2.4 | 34.1 ± 2.5 | | n‐Pentyl alcohol | 12.2 ± 1.0 | 12.4 ± 0.5 | 257 ± 25 | 258 ± 12 | | Isopentyl alcohol | 13.8 ± 0.5 | 13.2 ± 1.1 | 237 ± 7 | 235 ± 9 | The above relative rate constants are based on the values (in units of 10?12 cm3 molecule?1 s?1) of k(OH + propane) = 1.08, k(OH + cyclohexane) = 7.22, k(Cl + propane) = 131 and k(Cl + cyclohexane) = 307. The results are compared with previous determinations. © 2002 Wiley Periodicals, Inc. Int J Chem Kinet 35: 81–87, 2003 |
