English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The primary product formation of the reactions CH 2 Cl + O and CHCl 2  + O in the gas phase has been studied around room temperature. The coupling of a conventional discharge flow reactor viaa molecular sampling system to a mass spectrometer with electron impact ionization allowed the determination of labile andstable species (set-up A). The radicals are formed by H atom abstraction in the reactions CH 3 Cl + F and CH 2 Cl 2  + F. The product analysis leads to the following branching fractions relative to precursor consumption: For CH 2 Cl + O, the channel HCHO + Cl yields 19 % and CO + HCl + H yields 43 %, the contributions of the labile species HCO is foundbut not quantified. For CHCl 2  + O the channel CO + HCl + Cl yields 70 %, ClCHO and the labile ClCO are detected but not quantified. The comparison to CH 3  + O shows the stepwise increase of channel fractions for the CO forming routes by chlorination of the methyl radical. Therates of the reactions have been studied relative to CH 3  + O and CH 3 OCH 2  + O. Laser-induced multiphoton ionization combined with TOF mass spectrometry and molecular beam sampling from a flow reactor(set-up B) was used for the specific and sensitive detection of the CH 2 Cl, CHCl 2 , CH 3 , and CH 3 OCH 2  radicals. The rate coefficient of the reactions CH 2 Cl + O was derived with reference to the reaction CH 3 OCH 2  leading to k = (8.1±1.8)×10 13  cm 3 /(mol·s) and for CHCl 2  + O with reference to CH 3  + O leading to k = (3.8±1.9)×10 13  cm 3 /(mol·s). For CH 3 Cl + F and CH 2 Cl 2  + F the rate coefficients have been determined with set-up A leading to k = (4.3±0.9)×10 13  cm 3 /(mol·s) for CH 3 Cl + F and k = (8.4±3.8)×10 13  cm 3 /(mol·s) for CH 2 Cl 2  + F. Only a negligible temperature dependence in the temperature range from 250–360 K was observed for all reactions studied.

zeitschrift für physikalische chemie

CH 2 Cl and CHCl 2  Radical Chemistry: The Formation by the Reactions CH 3 Cl + F and CH 2 Cl 2  + F and The Destruction by the Reactions CH 2 Cl + O and CHCl 2  + O