Direct evidence for a substantive reaction between the Criegee intermediate, CH2OO, and the water vapour dimer

Direct evidence for a substantive reaction between the Criegee intermediate, CH2OO, and the water vapour dimer

The C1 Criegee intermediate, CH2OO, reaction with water vapour has been studied. The removal rate constant shows a quadratic dependence on [H2O], implying reaction with the water dimer, (H2O)2. The rate constant, kCH2OO+(H2O)2 = (4.0 ± 1.2) × 10(-12) cm(3) molecule(-1) s(-1), is such that this is th...

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Veröffentlicht in:Physical chemistry chemical physics : PCCP 2015-02, Vol.17 (7), p.4859-4863
Hauptverfasser: Lewis, Tom R, Blitz, Mark A, Heard, Dwayne E, Seakins, Paul W
Format: Artikel
Sprache:eng
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Zusammenfassung:The C1 Criegee intermediate, CH2OO, reaction with water vapour has been studied. The removal rate constant shows a quadratic dependence on [H2O], implying reaction with the water dimer, (H2O)2. The rate constant, kCH2OO+(H2O)2 = (4.0 ± 1.2) × 10(-12) cm(3) molecule(-1) s(-1), is such that this is the major atmospheric sink for CH2OO.
ISSN:1463-9084
DOI:10.1039/c4cp04750h