Abstract
The amount of kinetic energy release accompanying the metastable ion reaction C7H7+ (m/z 91) → C5H5+(m/z 65) + C2H2 has been determined for 24 derivatives of toluene by scanning electric sector voltage of a double focusing mass spectrometer.
Except for the case of benzyl methyl ether and benzyl chloride, the determined values were nearly equal to those for the C7H7+ ions from toluene and isopropyl o-toluate, which are considered to produce the C7H7+ ion of tropylium ion structure.
From the profile of metastable ion peak, the mechanism of the fragmentation reaction C7H7I+· (m/z 218) → C7H7+ (m/z 91) + I · for m- and p-iodotoluenes has been estimated.
