These tables of evaluated rate constants for use in stratospheric modeling have been taken from the most recent report of the NASA Panel that has been periodically producing such reviews. They are reproduced here to make a broader community aware of their existence. This article should NOT be cited, nor should these rate constants be used without consulting the full report. All citations should be to that original report , which contains extensive documentation and discussion of the rationale of the evaluation. Copies may be obtained by requesting JPL Publ. 85-37 from Documentation Services, 111-116B, Jet Propulsion

Data on AHr", the standard enthalpies of formation, in the gas phase for over 300 oxygen-containing compounds are critically examined. Internal consistencies within this set are scrutinized from the viewpoint of group additivity principles. New values for the contributions of groups to AHf", as well as higher order corrections, are obtained from multilinear regression analyses of the data. For alcohols and ethers observed values and group additivity values agree to within f l . O kcal/mol, which is about the experimental precision. The data on these classes are very self-consistent. Very nearly the same is true of aldehydes and ketones. Major discrepancies exist in the classes of acids and esters and a few key compounds deviate seriously from other members of their class.

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The unimolecular homogeneous decomposition of hexafluoroazomethane was studied in a VLPP apparatus in the temperature range 720-1050 K and is consistent with the following Arrhenius parameters: log k(sec-') = 16.2 -55.2/0 a t 900 K, where the A factor was assumed to he the same as for 2,2'-azoisobutane. The homogeneous rate of recombination of CF3 radicals a t temperatures around 1000 K was also studied under VLPP conditions and was found to be in the fall-off region, corresponding to k / k = 8.5 X when a rotational transition-state model was used. This model predicts an essentially constant value of k;" of over the temperature range 300-1000 K.