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

doi:10.1016/j.ijms.2013.11.008

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

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

Chemistry

Research output: Contribution to journal › Article › peer-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 σ_para 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 σ_para 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 language	English
Pages (from-to)	24-27
Number of pages	4
Journal	International Journal of Mass Spectrometry
Volume	360
Issue number	1
DOIs	https://doi.org/10.1016/j.ijms.2013.11.008
State	Published - 1 Mar 2014

Bibliographical note

Funding Information:
The authors gratefully acknowledge the support of NASA under Grant NNX10AB96G . We would also like to thank Inbal Tuvi-Arad from The Open University of Israel for her help and suggestions.

Keywords

Benzene analog
Electron-ion dissociative recombination
Flowing afterglow
Hammett constant

Access to Document

10.1016/j.ijms.2013.11.008

Cite this

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

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.",

keywords = "Benzene analog, Electron-ion dissociative recombination, Flowing afterglow, Hammett constant",

author = "Osborne, {David S.} and Itzhak Dotan and Adams, {Nigel G.}",

note = "Funding Information: The authors gratefully acknowledge the support of NASA under Grant NNX10AB96G . We would also like to thank Inbal Tuvi-Arad from The Open University of Israel for her help and suggestions.",

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AU - Dotan, Itzhak

AU - Adams, Nigel G.

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