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  • 1
    Electronic Resource
    Electronic Resource
    Kinetics studies of reactions of OH radicals with four haloethanes part I. Experiment and BEBO calculation (1992)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 24 (1992), S. 1-10 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The rate constants for reactions of OH with ClCH2CH2Cl, Cl2CHCHCl2, BrCH2CH2Br, CH3CH2Br have been measured by using a discharge flow-resonance fluorescence (DF-RF) technique over the temperature range 293-418 K. The rate constants as a function of temperature were fitted to the Arrhenius expression as follows: (k's units are 10-12 cm3 molecule-1 s-1, and Ea's units are cal/mol) \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm OH} + {\rm ClCH}_2 {\rm CH}_2 {\rm Cl}:} & {k_1 = (8.91 \pm 1.63)^ \ast {\rm EXP}((-2164.5 \pm 119.9)/RT)}\\[10pt] {{\rm OH} + {\rm BrCH}_2 {\rm CH}_2 {\rm Br}:} & {k_2 = (14.36 \pm 2.70)^ \ast {\rm EXP}((- 2521.4 \pm 123.5)/RT)}\\[10pt] {{\rm OH} + {\rm Cl}_2 {\rm CHCHCl}_2:} & {k_3 = (5.01 \pm 0.89)^ \ast {\rm EXP}((- 1825.8 \pm 116.7)/RT)} \\[10pt] {{\rm OH} + {\rm CH}_3 {\rm CH}_2 {\rm Br}:} & {k_4 = (23.45 \pm 4.62)^ \ast {\rm EXP}((- 2558.2 \pm 124.1)/RT)}\end{array} $$\end{document} The experimental data have been compared with theoretical calculations of the semi-empirical BEBO-transition state method. Life-times of the four haloethanes in the troposphere have been estimated.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550240102
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    Paper (German National Licenses)
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  • 2
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    Predicted rocket and shuttle effects on stratospheric ozone (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The major chemical effluents of either solid- or liquid-fueled rockets that can potentially perturb stratospheric ozone include chlorine compounds (HCl), nitrogen compounds (NO(x)), and hydrogen compounds (H2 and H2O). Radicals (Cl, ClO, H, OH, HO2, NO, and NO2) formed directly or indirectly from rocket exhaust can cause the catalytic destruction of ozone. Other exhaust compounds that could presumably lead to ozone destruction either by direct reaction with ozone or by providing a surface for heterogeneous processes include the particulates Al2O3, ice, and soot. These topics are discussed in terms of the possible effects of rocket exhausts on stratospheric ozone.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA, Washington, Scientific Assessment of Ozone Depletion: 1991; 13 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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