Kinetics and mechanism of gas-phase reactions of n-C4F9OCH3, i-C4F9OCH3, n-C4F9OC(O)H, and i-C4F9OC(O)H with OH radicals in an environmental reaction chamber at 253–328K

The rate constants of the reactions of n -C 4 F 9 OCH 3 ( k 1 ), i -C 4 F 9 OCH 3 ( k 2 ), n -C 4 F 9 OC(O)H ( k 3 ), and i -C 4 F 9 OC(O)H ( k 4 ) with OH radicals were studied in an 11.5-dm 3 environmental reaction chamber. k 1 and k 2 were determined to be (1.44 ± 0.33) × 10 –12 exp[–(1450 ± 70)/ T ] and (1.59 ± 0.41) × 10 –12 exp[–(1470 ± 80)/ T ] cm 3 molecule –1 s –1 at 253–328 K. At 298 K, k 3 and k 4 were deduced to be (1.71 ± 0.32) × 10 –14 and (1.67 ± 0.19) × 10 –14 cm 3 molecule –1 s –1 . The observed products of the reaction of n -C 4 F 9 OCH 3 with OH radicals were n -C 4 F 9 OC(O)H, CF 3 CF 2 CF 2 C(O)F, and COF 2 , and those for the reaction of i -C 4 F 9 OCH 3 were i -C 4 F 9 OC(O)H, (CF 3 ) 2 CFC(O)F, CF 3 C(O)F, and COF 2 .