Absolute and relative rate constants for the reactions CH3C(O)O2 + NO and CH3C(O)O2 + NO2 and thermal stability of CH3C(O)O2NO2

Jens Sehested; Lene Krogh Christensen; Trine Møgelberg; Ole J. Nielsen; Timothy J. Wallington; Andrei Guschin; John J. Orlando; Geoffrey S. Tyndall

Absolute and relative rate constants for the reactions CH₃C(O)O₂ + NO and CH₃C(O)O₂ + NO₂ and thermal stability of CH₃C(O)O₂NO₂

Jens Sehested^*, Lene Krogh Christensen, Trine Møgelberg, Ole J. Nielsen, Timothy J. Wallington, Andrei Guschin, John J. Orlando, Geoffrey S. Tyndall

^*Corresponding author for this work

29 Citations (Scopus)

Abstract

A pulse-radiolysis system was used to measure absolute rate constants for the reactions of CH₃C(O)O₂ radicals with NO and NO₂ at 295 K and 1000 mbar total pressure of SF₆. When the rate of formation and decay of NO₂ using its absorption at 400.5 and 452 nm were monitored, the rate constants k(CH₃C(O)O₂ + NO) = (2.0 ± 0.3) × 10^-11 and k(CH₃C(O)O₂ + NO₂) = (1.0 ± 0.2) × 10^-11 cm³ molecule^-1 s^-1 were determined. Long path-length Fourier transform infrared spectrometers were used to study the rate-constant ratio k(CH₃C-(O)O₂ + NO)/k(CH₃C(O)O₂ + NO₂) in 6-700 Torr total pressure of N₂ diluent at 243-295 K. At 295 K in 700 Torr of N₂ diluent k(CH₃C(O)O₂ + NO)/k(CH₃C(O)O₂ + NO₂) = 2.07 ± 0.21. The results are discussed in the context of the atmospheric chemistry of acetylperoxy radicals.

Original language	English
Journal	Journal of Physical Chemistry A
Volume	102
Issue number	10
Pages (from-to)	1779-1789
Number of pages	11
ISSN	1089-5639
Publication status	Published - 5 Mar 1998

Cite this

@article{c1e09e6376ff4f9a94426fa6d71e1726,

title = "Absolute and relative rate constants for the reactions CH3C(O)O2 + NO and CH3C(O)O2 + NO2 and thermal stability of CH3C(O)O2NO2",

abstract = "A pulse-radiolysis system was used to measure absolute rate constants for the reactions of CH3C(O)O2 radicals with NO and NO2 at 295 K and 1000 mbar total pressure of SF6. When the rate of formation and decay of NO2 using its absorption at 400.5 and 452 nm were monitored, the rate constants k(CH3C(O)O2 + NO) = (2.0 ± 0.3) × 10-11 and k(CH3C(O)O2 + NO2) = (1.0 ± 0.2) × 10-11 cm3 molecule-1 s-1 were determined. Long path-length Fourier transform infrared spectrometers were used to study the rate-constant ratio k(CH3C-(O)O2 + NO)/k(CH3C(O)O2 + NO2) in 6-700 Torr total pressure of N2 diluent at 243-295 K. At 295 K in 700 Torr of N2 diluent k(CH3C(O)O2 + NO)/k(CH3C(O)O2 + NO2) = 2.07 ± 0.21. The results are discussed in the context of the atmospheric chemistry of acetylperoxy radicals.",

author = "Jens Sehested and Christensen, {Lene Krogh} and Trine M{\o}gelberg and Nielsen, {Ole J.} and Wallington, {Timothy J.} and Andrei Guschin and Orlando, {John J.} and Tyndall, {Geoffrey S.}",

year = "1998",

month = mar,

day = "5",

language = "English",

volume = "102",

pages = "1779--1789",

journal = "Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory",

issn = "1089-5639",

publisher = "American Chemical Society",

number = "10",

}

TY - JOUR

T1 - Absolute and relative rate constants for the reactions CH3C(O)O2 + NO and CH3C(O)O2 + NO2 and thermal stability of CH3C(O)O2NO2

AU - Sehested, Jens

AU - Christensen, Lene Krogh

AU - Møgelberg, Trine

AU - Nielsen, Ole J.

AU - Wallington, Timothy J.

AU - Guschin, Andrei

AU - Orlando, John J.

AU - Tyndall, Geoffrey S.

PY - 1998/3/5

Y1 - 1998/3/5

N2 - A pulse-radiolysis system was used to measure absolute rate constants for the reactions of CH3C(O)O2 radicals with NO and NO2 at 295 K and 1000 mbar total pressure of SF6. When the rate of formation and decay of NO2 using its absorption at 400.5 and 452 nm were monitored, the rate constants k(CH3C(O)O2 + NO) = (2.0 ± 0.3) × 10-11 and k(CH3C(O)O2 + NO2) = (1.0 ± 0.2) × 10-11 cm3 molecule-1 s-1 were determined. Long path-length Fourier transform infrared spectrometers were used to study the rate-constant ratio k(CH3C-(O)O2 + NO)/k(CH3C(O)O2 + NO2) in 6-700 Torr total pressure of N2 diluent at 243-295 K. At 295 K in 700 Torr of N2 diluent k(CH3C(O)O2 + NO)/k(CH3C(O)O2 + NO2) = 2.07 ± 0.21. The results are discussed in the context of the atmospheric chemistry of acetylperoxy radicals.

AB - A pulse-radiolysis system was used to measure absolute rate constants for the reactions of CH3C(O)O2 radicals with NO and NO2 at 295 K and 1000 mbar total pressure of SF6. When the rate of formation and decay of NO2 using its absorption at 400.5 and 452 nm were monitored, the rate constants k(CH3C(O)O2 + NO) = (2.0 ± 0.3) × 10-11 and k(CH3C(O)O2 + NO2) = (1.0 ± 0.2) × 10-11 cm3 molecule-1 s-1 were determined. Long path-length Fourier transform infrared spectrometers were used to study the rate-constant ratio k(CH3C-(O)O2 + NO)/k(CH3C(O)O2 + NO2) in 6-700 Torr total pressure of N2 diluent at 243-295 K. At 295 K in 700 Torr of N2 diluent k(CH3C(O)O2 + NO)/k(CH3C(O)O2 + NO2) = 2.07 ± 0.21. The results are discussed in the context of the atmospheric chemistry of acetylperoxy radicals.

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M3 - Journal article

AN - SCOPUS:0001328916

SN - 1089-5639

VL - 102

SP - 1779

EP - 1789

JO - Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory

JF - Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory

IS - 10

ER -

Absolute and relative rate constants for the reactions CH₃C(O)O₂ + NO and CH₃C(O)O₂ + NO₂ and thermal stability of CH₃C(O)O₂NO₂

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