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Hydroxyl radical reactivity with diethylhydroxylamine.

R A Gorse, R R Lii, B B Saunders

    Science (New York, N.Y.)
    |September 30, 1977
    PubMed
    Summary
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    Diethylhydroxylamine (DEHA) rapidly reacts with gas-phase hydroxyl radicals, unlike its slower reaction in water. This high reactivity suggests DEHA can inhibit atmospheric smog formation.

    Area of Science:

    • Atmospheric Chemistry
    • Chemical Kinetics
    • Environmental Science

    Background:

    • Diethylhydroxylamine (DEHA) is a chemical compound with potential applications in atmospheric processes.
    • Understanding the reaction kinetics of DEHA is crucial for predicting its environmental impact.
    • Hydroxyl radicals are key oxidants in the atmosphere and play a significant role in smog formation.

    Purpose of the Study:

    • To investigate the reaction rate of DEHA with hydroxyl radicals in both gas-phase and aqueous phases.
    • To determine the implications of DEHA's reactivity for atmospheric smog formation.
    • To elucidate the reaction mechanism of DEHA with hydroxyl radicals in aqueous solution.

    Main Methods:

    • Experimental studies were conducted to measure the reaction rates.

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  • Gas-phase and aqueous-phase reactions were analyzed separately.
  • Kinetic data was collected and analyzed to understand reaction pathways.

    • Main Results:

    • DEHA exhibits a high reaction rate with gas-phase hydroxyl radicals, occurring on approximately every third collision.
    • The reaction of DEHA with hydroxyl radicals in aqueous solution is significantly slower compared to the gas-phase reaction.
    • The observed gas-phase reactivity supports the prediction of DEHA's inhibitory effect on atmospheric smog.

    Conclusions:

    • The rapid gas-phase reaction of DEHA with hydroxyl radicals is a key factor in its potential role as an atmospheric smog inhibitor.
    • Further studies on the aqueous-phase reaction mechanism of DEHA with hydroxyl radicals are valuable for a comprehensive understanding.
    • DEHA's differential reactivity in gas and aqueous phases has important implications for environmental chemistry and pollution control.