Pulse radiolysis study of reactions of alkyl and alkylperoxy radicals originating from methyl tert-butyl ether in the gas phase

Sarka Langer; Evert Ljungström; Thomas Ellermann; Ole J. Nielsen; Jens Sehested

doi:10.1016/0009-2614(95)00571-K

Pulse radiolysis study of reactions of alkyl and alkylperoxy radicals originating from methyl tert-butyl ether in the gas phase

Sarka Langer, Evert Ljungström^*, Thomas Ellermann, Ole J. Nielsen, Jens Sehested

^*Corresponding author for this work

9 Citations (Scopus)

Abstract

UV spectra and kinetics for the reactions of alkyl and alkylperoxy radicals from methyl tert-butyl ether (MTBE) were studied in 1 atm of SF₆ by the pulse radiolysis-UV absorption technique. UV spectra for the radical mixtures were quantified from 215 to 340 nm. At 240 nm. σ_R = (2.6 ± 0.4) × 10^-18 cm² molecule^-1 and σ_RO₂ = (4.1 ± 0.6) × 10^-18 cm² molecule^-1 (base e). The rate constant for the self-reaction of the alkyl radicals is (2.5 ± 1.1) × 10^-11 cm³ molecule^-1 s^-1. The rate constants for reaction of the alkyl radicals with molecular oxygen and the alkylperoxy radicals with NO and NO₂ are (9.1 ± 1.5) × 10^-13, (4.3 ± 1.6) × 10^-12 and (1.2 ± 0.3) × 10^-11 cm³ molecule^-1 s^-1, respectively. The rate constants given above refer to reaction at the tert-butyl side of the molecule.

Original language	English
Journal	Chemical Physics Letters
Volume	240
Issue number	5-6
Pages (from-to)	499-505
Number of pages	7
ISSN	0009-2614
DOIs	https://doi.org/10.1016/0009-2614(95)00571-K
Publication status	Published - 7 Jul 1995

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@article{3877865929874caa872a76d14d102fa3,

title = "Pulse radiolysis study of reactions of alkyl and alkylperoxy radicals originating from methyl tert-butyl ether in the gas phase",

abstract = "UV spectra and kinetics for the reactions of alkyl and alkylperoxy radicals from methyl tert-butyl ether (MTBE) were studied in 1 atm of SF6 by the pulse radiolysis-UV absorption technique. UV spectra for the radical mixtures were quantified from 215 to 340 nm. At 240 nm. σR = (2.6 ± 0.4) × 10-18 cm2 molecule-1 and σRO2 = (4.1 ± 0.6) × 10-18 cm2 molecule-1 (base e). The rate constant for the self-reaction of the alkyl radicals is (2.5 ± 1.1) × 10-11 cm3 molecule-1 s-1. The rate constants for reaction of the alkyl radicals with molecular oxygen and the alkylperoxy radicals with NO and NO2 are (9.1 ± 1.5) × 10-13, (4.3 ± 1.6) × 10-12 and (1.2 ± 0.3) × 10-11 cm3 molecule-1 s-1, respectively. The rate constants given above refer to reaction at the tert-butyl side of the molecule.",

author = "Sarka Langer and Evert Ljungstr{\"o}m and Thomas Ellermann and Nielsen, {Ole J.} and Jens Sehested",

year = "1995",

month = jul,

day = "7",

doi = "10.1016/0009-2614(95)00571-K",

language = "English",

volume = "240",

pages = "499--505",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier",

number = "5-6",

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TY - JOUR

T1 - Pulse radiolysis study of reactions of alkyl and alkylperoxy radicals originating from methyl tert-butyl ether in the gas phase

AU - Langer, Sarka

AU - Ljungström, Evert

AU - Ellermann, Thomas

AU - Nielsen, Ole J.

AU - Sehested, Jens

PY - 1995/7/7

Y1 - 1995/7/7

N2 - UV spectra and kinetics for the reactions of alkyl and alkylperoxy radicals from methyl tert-butyl ether (MTBE) were studied in 1 atm of SF6 by the pulse radiolysis-UV absorption technique. UV spectra for the radical mixtures were quantified from 215 to 340 nm. At 240 nm. σR = (2.6 ± 0.4) × 10-18 cm2 molecule-1 and σRO2 = (4.1 ± 0.6) × 10-18 cm2 molecule-1 (base e). The rate constant for the self-reaction of the alkyl radicals is (2.5 ± 1.1) × 10-11 cm3 molecule-1 s-1. The rate constants for reaction of the alkyl radicals with molecular oxygen and the alkylperoxy radicals with NO and NO2 are (9.1 ± 1.5) × 10-13, (4.3 ± 1.6) × 10-12 and (1.2 ± 0.3) × 10-11 cm3 molecule-1 s-1, respectively. The rate constants given above refer to reaction at the tert-butyl side of the molecule.

AB - UV spectra and kinetics for the reactions of alkyl and alkylperoxy radicals from methyl tert-butyl ether (MTBE) were studied in 1 atm of SF6 by the pulse radiolysis-UV absorption technique. UV spectra for the radical mixtures were quantified from 215 to 340 nm. At 240 nm. σR = (2.6 ± 0.4) × 10-18 cm2 molecule-1 and σRO2 = (4.1 ± 0.6) × 10-18 cm2 molecule-1 (base e). The rate constant for the self-reaction of the alkyl radicals is (2.5 ± 1.1) × 10-11 cm3 molecule-1 s-1. The rate constants for reaction of the alkyl radicals with molecular oxygen and the alkylperoxy radicals with NO and NO2 are (9.1 ± 1.5) × 10-13, (4.3 ± 1.6) × 10-12 and (1.2 ± 0.3) × 10-11 cm3 molecule-1 s-1, respectively. The rate constants given above refer to reaction at the tert-butyl side of the molecule.

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U2 - 10.1016/0009-2614(95)00571-K

DO - 10.1016/0009-2614(95)00571-K

M3 - Journal article

AN - SCOPUS:0010478821

SN - 0009-2614

VL - 240

SP - 499

EP - 505

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 5-6

ER -

Pulse radiolysis study of reactions of alkyl and alkylperoxy radicals originating from methyl tert-butyl ether in the gas phase

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