Energy dependence of ion-molecule reactions. II. Methyl chloride

Abstract

The ion-molecule reactions of ions in methyl chloride were studied in the gas phase at source pressures of up to 120 μ in a mass spectrometer using ions having exit energies which ranged from 0.2 to 2.0 eV. The ions produced by secondary processes included CH₄Cl⁺, CH₂Cl⁺, and C₂H₆Cl⁺. The rate constant for the reaction of CH₃Cl⁺ was found to be independent of the ion energy in the energy range studied. A theoretical rate constant which is independent of the ion energy was also derived for reactions between ions and polar molecules. Negative ion spectra were briefly examined.