KINETICS OF THE GAS-PHASE REACTIONS OF ALKYLNAPHTHALENES WITH O-3, N2O5 AND OH RADICALS AT 298+/-2-K

Rate constants for the gas-phase reactions of the OH radical with 1-methylnaphthalene and of N2O5 with 1- and 2-methylnaphthalene and 2,3-dimethylnaphthalene have been determined at 298 ± 2 K by use of relative rate techniques. The rate constants determined were: for the reaction of OH radicals with 1-methylnaphthalene, (5.30 ± 0.48) × 10-11 cm3 molecule-1 s-1; for the reaction of N2O5 with 1-methylnaphthalene, 2-methylnaphthalene and 2,3-dimethylnaphthalene, (3.3 ± 0.7) × 10-17, (4.2 ± 0.9) × 10-17 and (5.7 ± 1.9) × 10-17 cm3 molecule-1 s-1, respectively. In addition, an upper limit to the rate constant of 1.3 × 10-19 cm3 molecule-1 s-1 was measured for the reaction of O3 with 1-methylnaphthalene at 298 ± 2 K. These data, when combined with data from previous literature, allow the atmospheric gas-phase removal processes of these alkylnaphthalenes to be quantified. © 1987.