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Henry's law constants of some environmentally important aldehydes

Betterton, Eric A. and Hoffmann, Michael R. (1988) Henry's law constants of some environmentally important aldehydes. Environmental Science and Technology, 22 (12). pp. 1415-1418. ISSN 0013-936X. doi:10.1021/es00177a004.

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The Henry’s law constants of seven aldehydes have been determined as a function of temperature by bubble-column and by head-space techniques. The compounds were chosen for their potential importance in the polluted troposphere and to allow structure-reactivity patterns to be investigated. The results (at 25 ºC) are as follows (in units of M atm^(-1)): chloral, 3.44 X 10^5; glyoxal, ≥ 13 X 10^5; methylglyoxal, 3.71 X 10^3; formaldehyde, 2.97 X 10^3; benzaldehyde, 3.74 X 10^1; hydroxyacetaldehyde, 4.14 X 10^4; acetaldehyde, 1.14 X 10^1. A plot of Taft’s parameter, ∑σ^*, vs log H^* (the apparent Henry’s law constant) gives a straight line with a slope of 1.72. H^* for formaldehyde is anomalously high, as expected, but the extremely high value for hydroxyacetaldehyde was unexpected and may indicate that α-hydroxy-substituted aldehydes could have an unusually high affinity for the aqueous phase. The intrinsic Henry’s law constants, H, corrected for hydration, do not show a clear structure-reactivity pattern for this series of aldehydes.

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Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 1988 American Chemical Society. Received for review January 27,1988. Accepted May 31,1988.
Issue or Number:12
Record Number:CaltechAUTHORS:20150814-112038487
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Official Citation:Henry's law constants of some environmentally important aldehydes Eric A. Betterton and Michael R. Hoffmann Environmental Science & Technology 1988 22 (12), 1415-1418 DOI: 10.1021/es00177a004
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59538
Deposited By: Ruth Sustaita
Deposited On:14 Aug 2015 19:34
Last Modified:10 Nov 2021 22:22

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