Ion-molecule reactions in methylene fluoride

Abstract

The ion-molecule reactions of CH₂F₂ in the gas phase were studied using two mass spectrometers, one fitted with a medium-pressure ion source and the other with an ion-trap source. The main reaction was the formation of CH₂F⁺ from CHF₂⁺. The molecular ion and its proton transfer reaction forming CH₃F₂⁺ were of lesser importance. The only condensation ion formed was C₂H₄F₃+. Reaction cross sections and rate coefficients for a number of ions at exit energies of 0.2-3.3 eV were measured.