Trends in electron-ion dissociative recombination of benzene analogs with functional group substitutions: Positive Hammett σpara constants

David S. Osborne, Itzhak Dotan, Nigel G. Adams

Research output: Contribution to journalArticlepeer-review

Abstract

An in-depth study of the effects of functional group substitution on benzene's electron-ion dissociative recombination (e-IDR) rate constants has been conducted. The e-IDR rate constants for nitrobenzene, benzonitrile, acetophenone, benzyl methyl ether, and phenyl isothiocyanate have been measured using a flowing afterglow equipped with an electrostatic Langmuir probe (FALP). A trend has been indicated between the associated positive Hammett σpara constant for each functional group substitution and the e-IDR rate constants for the protonated form of the benzene analog. Such a plot has indicated that protonated benzene analogs which have functional groups substitutions with a positive Hammett σpara constant value have approximately the same e-IDR rate constant of 4.6 × 10-7 cm3 s-1. Implications of the observed trends to the predictions of e-IDR rate constants for unmeasured benzene analogs are discussed.

Original languageEnglish
Pages (from-to)24-27
Number of pages4
JournalInternational Journal of Mass Spectrometry
Volume360
Issue number1
DOIs
StatePublished - 1 Mar 2014

Keywords

  • Benzene analog
  • Electron-ion dissociative recombination
  • Flowing afterglow
  • Hammett constant

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

Fingerprint

Dive into the research topics of 'Trends in electron-ion dissociative recombination of benzene analogs with functional group substitutions: Positive Hammett σpara constants'. Together they form a unique fingerprint.

Cite this