Abstract
The ion chemistry in octafluorocyclopentene (c-C5F8) is examined by Fourier-transform mass spectrometry under single-collision conditions in the 10−7 Torr pressure range. Absolute total and partial cross-sections of electron impact ionization on c-C5F8 are measured as a function of the electron energy in the range 10–200 eV. The molecular ion and 11 fragment ions are observed with a total cross-section of 1.0 × 10−15 cm2 at ∼70 eV. The ion population at low energies (< 40 eV) is dominated by , , , and . Ar+ charge transfer reaction with c-C5F8 produces the same important ions except the parent ion . All ions from c-C5F8 are non-reactive with the parent gas molecule, except CF+ and , which react to form .
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