Fourier
transform infrared smog chamber techniques were used to
study the kinetics and mechanisms of the reactions of Cl atoms and
OH radicals with pentafluorophenol (C6F5OH)
in 700 Torr total pressure of air or N2 diluent at 296
± 2 K. Rate constants k(OH + C6F5OH) = (6.88 ± 1.37) × 10–12 cm3 molecule–1 s–1 and k(Cl + C6F5OH) = (2.52 ± 0.31)
× 10–11 cm3 s–1 molecule–1 in 700 Torr air diluent were determined.
In 700 Torr N2, the rate constant for the reaction of C6F5OH with Cl atoms is linearly dependent on the
Cl atom concentration. Product studies on this reaction in both 700
Torr air and 700 Torr N2 diluent show the formation of
nonconjugated products. The photolysis constant of C6F5OH was determined by 254 nm UV irradiation of a C6F5OH and CH3CHO mixture in 700 Torr air or
N2 at 296 ± 2 K and yielded a photolysis rate constant
of J(C6F5OH) = (2.83 ±
0.25) × 10–3 s–1. Results
are discussed with respect to the atmospheric chemistry of other halogenated
aromatic species.
Smog chambers interfaced with in-situ FT-IR detection were used to investigate the kinetics and mechanisms of the Cl atom, OH radical, and O3 initiated oxidation of (Z)- and (E)- 1,2-...
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