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Reactions of naphthalene in N 2 O 5 NO 3 NO 2 air mixtures
Author(s) -
Atkinson Roger,
Tuazon Ernesto C.,
Arey Janet
Publication year - 1990
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.550221006
Subject(s) - chemistry , naphthalene , radical , torr , adduct , thermal decomposition , atmospheric temperature range , decomposition , infrared spectroscopy , photochemistry , absorption (acoustics) , fourier transform infrared spectroscopy , analytical chemistry (journal) , medicinal chemistry , organic chemistry , thermodynamics , physics , quantum mechanics , acoustics
The reactions of naphthalene in N 2 O 5 NO 3 NO 2 N 2 O 2 reactant mixtures have been investigated over the temperature range 272–297 K at ca. 745 torr total pressure and at 272 K and ca. 65 torr total pressure using long pathlength Fourier transform infrared absorption spectroscopy. 2,3‐Dimethyl‐2‐butene was added to the reactant mixtures at 272 K to rapidly scavenge the NO 3 radicals both initially present in the added N 2 O 5 and formed from the thermal decomposition of N 2 O 5 during the reactions. The data obtained in the presence and absence of added 2,3‐dimethyl‐2‐butene showed that napthalene undergoes initial reaction with the NO 3 radical to form an NO 3 ‐naphthalene adduct, which either rapidly decomposes back to the reactants (at a rate of ca. 5 × 10 5 s −1 at 298 K) or reacts exclusively with NO 2 to form products. When NO 3 radicals, N 2 O 5 and NO 2 are in equilibrium, this overall process is kinetically equivalent to reaction of naphthalene with N 2 O 5 , and previous kinetic and product studies have indeed assumed the reactions of naphthalene and alkyl‐substituted naphthalenes in N 2 O 5 NO 3 NO 2 air mixtures to be with N 2 O 5 , and not with NO 3 radicals.