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  • INORGANIC AND PHYSICAL CHEMISTRY  (16)
  • 1
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    Photochemical studies (1980)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: NASA, Washington Upper Atmosphere Res. Program; p 112
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  • 2
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    A temperature dependent kinetics study of the reaction of OH with CH2ClF, CHCl2F, CHClF2, CH3CCl3, CH3CF2Cl, and CF2ClCFCl2 (1977)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Journal of Physical Chemistry; 81; Feb. 10
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  • 3
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    A quantum yield determination of O/1D/ production from ozone via laser flash photolysis (1977)
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    Publication Date: 2011-08-17
    Description: The quantum yield of electronically excited atomic oxygen produced from ozone photolysis was measured at 298 K from wavelengths of 293.0 to 316.5 nm. The reaction of the atomic oxygen with N2O to form excited NO2 was used to monitor the O production; a frequency-doubled flashlamp-pumped dye laser which provided tunable ultraviolet in the desired spectral region with 0.1-nm linewidth served as the photolysis source. The atomic oxygen quantum yield was found to be constant below 300 nm, with a sharp decrease centered at 308 nm and a diminution to less than one tenth of the constant value by 313.5 nm.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Journal of Chemical Physics; 67; Oct. 1
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  • 4
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    Rate constants for reactions of ClO/x/ of atmospheric interest (1977)
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    Publication Date: 2011-08-17
    Description: Chemical kinetics measurements on 82 gas phase reactions of chlorine containing species are reviewed. Recommended rate constants are given. The principal species of interest are Cl, Cl2, ClO, Cl2O, ClOO, OClO, CINO, HCl and halo derivatives of methane and ethane. Absorption spectra are given for 21 species. In addition the chemical kinetics methods used to obtain these data are discussed with regard to their applicability and reliability.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Journal of Physical and Chemical Reference Data; 6; 3, 19; 1977
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  • 5
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    Kinetics of the reaction of hydroxyl radicals with nitric acid (1982)
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    Publication Date: 2019-06-28
    Description: An extensive study was made of the reaction of hydroxyl radicals with nitric acid in a laser photolysis-resonance fluorescence system. A 266 nm laser was used to photolyze HNO3 in the temperature range 225-415 K at pressures of 20-300 torr. A temperature dependence was detected below room temperature, with a leveling off at 298 K and a wide spread in the rate constants. A pressure dependence was observed over the entire range and was more pronounced at lower temperatures. The results are noted to be in agreement with those of previous investigations. However, the wide range of rate constants are suggested to be a problem for stratospheric HO(x) modeling for anthropogenic effects. No explanation could be given of the varying results obtained by other investigators regarding the kinetics of the reactions.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Journal of Physical Chemistry; 86; 19, 1; 1982
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  • 6
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    Kinetics study of the pressure dependence of the BrO + NO2 reaction at 298 K (1981)
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    Publication Date: 2019-06-28
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Journal of Physical Chemistry; 85; Jan. 22
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  • 7
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    Temperature dependence of the reaction O/3P/ + OH/2 Pi/ yields O2 + H (1980)
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    Publication Date: 2019-06-28
    Description: Measurements of the absolute rate and temperature dependence of the rate constant for the reaction of ground state atomic oxygen with hydroxyl radicals to yield molecular oxygen and hydrogen atoms over the temperature range 211-499 K are presented. The reaction was monitored in a low-pressure discharge flow resonance fluorescence apparatus under pseudo-first-order conditions in which the oxygen concentration was greater than the hydroxyl concentration. An expression for the temperature dependence of the rate constant is derived from a least-squares fit to the observed bimolecular rate constants, which were found to range from 3.21 to 2.77 x 10 to the -11th cu cm/molecule per sec for temperatures from 211 to 499 K, indicative of a slight negative temperature dependence. Results are compared with those of previous workers, and the significance of the lower value of the rate constant obtained in the present study to models of HO(x) in the upper stratosphere is indicated.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Journal of Physical Chemistry; 84; Dec. 25
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  • 8
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    A kinetics study of the reaction of SO2 with CH3O2 (1981)
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    Publication Date: 2019-06-28
    Description: The reaction of CH3O2 with SO2 has been studied using the flash photolysis/ultraviolet absorption technique. In contrast to previous measurements, no reaction could be detected over the temperature range 298-423 K. An upper limit of 5 x 10 to the -17th cu cm/molecule/sec has been determined for the reaction rate constant.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Chemical Physics Letters; 77; Feb. 1
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  • 9
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    Evaluated kinetic and photochemical data for atmospheric chemistry (1980)
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    Publication Date: 2019-06-28
    Description: This paper contains a critical evaluation of the kinetics and photochemistry of gas phase chemical reactions of neutral species involved in middle atmosphere chemistry (10-55 km altitude). Data sheets have been prepared for 148 thermal and photochemical reactions, containing summaries of the available experimental data with notes giving details of the experimental procedures. For each reaction a preferred value of the rate coefficient at 298 K is given together with a temperature dependency where possible. The selection of the preferred value is discussed, and estimates of the accuracies of the rate coefficients and temperature coefficients have been made for each reaction. The data sheets are intended to provide the basic physical chemical data needed as input for calculations which model atmospheric chemistry. A table summarizing the preferred rate data is provided, together with an appendix listing the available data on enthalpies of formation of the reactant and product species.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Journal of Physical and Chemical Reference Data; 9; 2, 19; 1980
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  • 10
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    Kinetics study of the Cl/2P/ + Cl2O yields Cl2 + ClO reaction at 298 K (1980)
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    Publication Date: 2019-06-27
    Description: The kinetics of the Cl + Cl2O reaction, a possible source of ClO(2 Pi) radicals for atmospheric photochemical studies, are investigated at 298 K. The discharge flow/mass spectrometry and discharge flow/resonance fluorescence techniques were used to monitor the decay of C12O in the presence of excess concentrations of atomic chlorine and chlorine monoxide, respectively. The pseudo-first order rate constants obtained from both experiments are found to be in excellent agreement, averaging 9.8 + or - 0.8 x 10 to the -11th cu cm/molecule per sec. Results are consistent with the lower limit obtained by Edgecombe et al. (1957) but differ by a factor of 150 from those of Basco and Dogra (1971). The present value is also noted to be consistent with a lower value for the rate constant of the reaction of oxygen atoms with Cl2O.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: Journal of Physical Chemistry; 84; June 26
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