Variable temperature rate studies for the reaction H3O + + (C2H2)2 measured with a coaxial molecular beam radio frequency ring electrode ion trap

Mark A. Smith, Bing Yuan, Andrei Sanov

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1 Scopus citations

Abstract

The independent molecule and ion temperature dependence of the rate coefficient for the H3O+ and (C2H 2)2 reaction producing C2H5O + are determined using a coaxial molecular beam radio frequency ring electrode ion trap (CoMB-RET). The H3O+ temperature is varied from 25 to 170 K, while the equilibrated C2H 2/(C2H2)2 beam temperatures sampled are 160, 180, 200, and 220 K. The rate coefficient of the H3O + + (C2H2)2 reaction is determined to be 4.0 × 10-10 × (Treact/300) -2.5 in the reaction temperature range of Treact = 114-187 K. The H3O+ and C2H2 radiative association reaction is found to have a rate coefficient below 1 × 10 -13 cm3·s-1 at 187 K. This result is consistent with Herbst's experimental determination.

Original languageEnglish (US)
Pages (from-to)9466-9472
Number of pages7
JournalJournal of Physical Chemistry A
Volume116
Issue number38
DOIs
StatePublished - Sep 27 2012

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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