Doubly charged ion mass spectra 8—alkenes

Abstract

Abstract Doubly charged ion mass spectra of 23 alkenes have been measured using a double focusing Hitachi RMU‐7L mass spectrometer. Ion mass spectra were obtained using 100 eV electron energy and 3.2 kV ion accelerating voltage. Each 2 E spectrum was determined using the olefinic compound under investigation as the target gas. In general, spectra are dominated by fragment ions which result from extensive hydrogen loss from the doubly charged molecular ion. Appearnce energies have been measured for intense fragment ions in each spectrum.