Ion mobility studies on the negative ion-molecule chemistry of pentachloroethane

Ramón González-méndez, Peter Watts, David C. Howse, Immacolata Procino, Henry Mcintyre, Chris A. Mayhew

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In this study we present an investigation of the negative ion-molecule chemistry of pentachloroethane (PCE) in air based ion mobility spectrometry and ion mobility spectrometry–mass spectrometry systems. The observed product ions are Cl−, produced by dissociative electron attachment, and Cl−·HOO resulting from a reaction with O2−. Based upon the moisture content of the system, these ions can be observed as a doublet in a ‘dry’ system or as a singlet in a ‘wet’ system. The nature of the Cl−·HOO product ion was investigated by using isoflurane (ISOF) as a probe to monitor the changing ratios of Cl− and Cl−·HOO as the PCE concentration decreased. This confirmed the origins of the two product anions. Electronic structure calculations are provided. These have aided the understanding of the reaction processes observed.
Original languageEnglish
JournalInternational Journal of Mass Spectrometry
Early online date29 Apr 2017
Publication statusE-pub ahead of print - 29 Apr 2017


  • Ion mobility spectrometry
  • IMS–MS
  • Pentachloroethane
  • Chlorinated ethane
  • Ion-molecule chemistry


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