Reaction of CHOplus;with C3H6as a Function of Ion Translational Energy

摘要

The reactions of CHOplus;ions derived from acetaldehyde source molecules on propylene have been studied using an inhyphen;line tandem mass spectrometer. Rate constants for the formation of propyl ions and for the unimolecular dissociation of propyl ions into C2H3plus;(plus;CH4) and C3H5plus;(plus;H2) as a function of ion translational energy were estimated from experimental data and reaction parameters. Comparison of the results with rates of decomposition of excited propyl ions calculated from the quasiequilibrium theory of mass spectra lead to the conclusion that the initial interaction of CHOplus;with propylene takes place via proton stripping rather than complex formation.