The Ionization Potentials of Formaldehyde and Halogen Derivatives of Methane

Abstract

The ionization potentials of C${\mathrm{H}}_2$O, C${\mathrm{H}}_3$Cl, C${\mathrm{H}}_3$Br, C${\mathrm{H}}_3$I were measured by a molecular ray method, and found to be 11.3, 10.7, 10.0, and 9.1 volts, respectively.