Studies of ion molecule reactions using a multiple quadrupole mass spectrometer. Part 3. The reactions of alkenyl radical cations CnH2n+ with alkenes

Abstract

The gas-phase reactions of ethenyl (C₂H₄^+˙), propenyl (C₃H₆^+˙), and butenyl (C₄H₈^+˙) with each of ethene, propene, but-1-ene, cis-but-2-ene, and 2-methylpropene have been reinvestigated using a triple quadrupole mass spectrometer. The present results are on the whole in good agreement with earlier studies, but the triple quadrupole enables reactions to be studied over a wider pressure range than the majority of previous investigations. It is particularly easy to isolate proposed sequences and thus to confirm (or disprove) particular reaction pathways.