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The reaction of acetylperoxy radicals with NO 2
Author(s) -
Basco Norman,
Parmar Sucha S.
Publication year - 1987
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550190204
Subject(s) - chemistry , radical , torr , reaction rate constant , analytical chemistry (journal) , acetaldehyde , flash photolysis , photodissociation , dissociation (chemistry) , oxygen , absorption spectroscopy , photochemistry , kinetics , thermodynamics , organic chemistry , physics , quantum mechanics , ethanol
Acetylperoxy radicals were produced by the flash photolysis of chlorine in the presence of acetaldehyde and oxygen. By adding various concentrations of nitrogen dioxide, the rate constant for the reaction producing PANwas measured to be k 4 (153 Torr) = (2.29 ± 0.05) × 10 9 L/mol s. The effect of pressure has been studied over the range 76–612 Torr and the data fitted to a fall‐off curve with k 4 ∘= 1.85 × 10 13 L 2 /mol 2 s. and k 4 x= 3.67 × 10 9 L/mol s. With a calculated value of the dissociation constant, k −4 ∘= 268 L/mol s and of the equilibrium constant, K 4 = 1.04 × 10 12 L/mol, the expected strong collision value for k 4 ∘is 2.79 × 10 14 L 2 /mol 2 s. The ultraviolet absorption spectrum of PAN has been characterized in the range 205–260 nm.