Chemistry International
Vol. 22, No. 5, September 2000
2000, Vol. 22
No. 5 (September)
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Chemistry International
Vol. 22, No. 5
September 2000
New Publication from the American Chemical Society and the American Institute of Physics
Evaluated Kinetic and Photochemical Data for Atmospheric Chemistry, Halogen Species: Supplement VIII. IUPAC Subcommittee on Gas Kinetic Data Evaluation for Atmospheric Chemistry, by R. Atkinson, D. L. Baulch, R. A. Cox, R. F. Hampson Jr., J. A. Kerr (Chairman), M. J. Rossi, and J. Troe. USD 55.00. Published in the Journal of Physical and Chemical Reference Data, Vol. 29, No. 2, pp. 167—266, 2000, by the American Chemical Society (1155 Sixteenth Street, N.W., Washington, DC 20036-9976) and the American Institute of Physics (Suite 1NO1, 2 Huntington Quadrangle, Melville, NY 11747-4502) for the National Institute of Standards and Technology [S0047-2689(00)00302-0].
This paper updates and extends part of the previous database of critical evaluations of the kinetics and photochemistry of gas-phase chemical reactions of neutral species involved in atmospheric chemistry [J. Phys. Chem. Ref. Data 9, 295 (1980); 11, 327 (1982); 13, 1259 (1984); 18, 881 (1989); 21, 1125 (1992); 26, 521 (1997); 26, 1329 (1997); 28, 191 (1999)].
The present evaluation is limited to the inorganic halogen family of atmospherically important reactions. The work has been carried out by the authors under the auspices of the IUPAC Subcommittee on Gas Phase Kinetic Data Evaluation for Atmospheric Chemistry. Data sheets have been prepared for 102 thermal and photochemical reactions, containing summaries of the available experimental data with notes giving details of the experimental procedures. For each thermal reaction, a preferred value of the rate coefficient at 298 K is given, together with a temperature dependence where possible. The selection of the preferred value is discussed, and esti-mates of the accuracies of the rate coefficients and temperature coefficients have been made for each reaction.
For each photochemical reaction, the data sheets list the preferred values of the photoabsorption cross sections and the quantum yields of the photochemical reactions, together with comments on how they were selected.
The data sheets are intended to provide the basic physical chemical data needed as input for calculations that model atmospheric chemistry. A table summarizing the preferred rate data is provided, together with an appendix listing the available values of enthalpies of formation of the reactant and product species.
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