Journal Article

FZJ-2018-06486

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Experimental and theoretical investigation of the reaction of RO 2 radicals with OH radicals: Dependence of the HO 2 yield on the size of the alkyl group

Assaf, E. (Corresponding author) ; Schoemaecker, C. ; Vereecken, L.FZJ* ; Fittschen, C.

2018
Wiley New York, NY

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/23332  doi:10.1002/kin.21191

Abstract: The HO2 yield in the reaction of peroxy radicals with OH radicals has been determined experimentally at 50 Torr helium by measuring simultaneously OH and HO2 concentration time profiles, following the photolysis of XeF2 in the presence of different hydrocarbons and O2. The following yields have been obtained: urn:x-wiley:05388066:media:kin21191:kin21191-math-0001 = (0.90 ± 0.1), urn:x-wiley:05388066:media:kin21191:kin21191-math-0002 = (0.75 ± 0.15), urn:x-wiley:05388066:media:kin21191:kin21191-math-0003 = (0.41 ± 0.08), and urn:x-wiley:05388066:media:kin21191:kin21191-math-0004 = (0.15 ± 0.03). The clear decrease in HO2 yield with increasing size of the alkyl moiety can be explained by an increased stabilization of the trioxide adduct, ROOOH. This has been confirmed by ab initio and Rice–Ramsperger–Kassel–Marcus master equation calculations. Extrapolation of the experimental results to atmospheric conditions shows that the stabilized adduct, ROOOH, is the nearly exclusive product of the reaction between OH radicals and peroxy radicals containing more than three C‐atoms. The fate and possible impact of these species is completely unexplored so far.

---

Contributing Institute(s):

1. Troposphäre (IEK-8)

Research Program(s):

1. 243 - Tropospheric trace substances and their transformation processes (POF3-243) (POF3-243)

Appears in the scientific report 2018

---

Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

---