Metastable ion studies. IX—Thermochemistry and ion structures among fragmentating ions, an electron impact and field ionization investigation

Abstract Metastable peak shapes, dimensions and relative abundances have been measured for the fragmentations ions were generated from but 1‐ene, cis‐and trans ‐ but‐2‐ene, 2‐methylpropene, methylcyclopropane and cyclobutane. Forward and reverse activation energies for the above reactions have been estimated and daughter ion structures proposed. The pathway for the consecutive reaction which generates the metastable peak ( m / e 56 → m / e 53) …