Abstract. We present a digital, freely available, searchable, and
evaluated compilation of rate coefficients for the gas-phase reactions of
organic compounds with OH, Cl, and NO3 radicals and with O3.
Although other compilations of many of these data exist, many are
out of date, most have limited scope, and all are difficult to search and to
load completely into a digitized form. This compilation uses results of
previous reviews, though many recommendations are updated to incorporate new
or omitted data or address errors, and includes recommendations on many
reactions that have not been reviewed previously. The database, which
incorporates over 50 years of measurements, consists of a total of 2765
recommended bimolecular rate coefficients for the reactions of 1357 organic
substances with OH, 709 with Cl, 310 with O3, and 389 with NO3,
and is much larger than previous compilations. Many compound types are
present in this database, including naturally occurring chemicals formed in
or emitted to the atmosphere and anthropogenic compounds such as halocarbons
and their degradation products. Recommendations are made for rate
coefficients at 298 K and, where possible, the temperature dependences over
the entire range of the available data. The primary motivation behind this
project has been to provide a large and thoroughly evaluated training
dataset for the development of structure–activity relationships (SARs),
whose reliability depends fundamentally upon the availability of
high-quality experimental data. However, there are other potential
applications of this work, such as research related to atmospheric lifetimes
and fates of organic compounds, or modelling gas-phase reactions of organics
in various environments. This database is freely accessible at
https://doi.org/10.25326/36 (McGillen et al., 2019).
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