title: Ion-molecule reactions involving methyl isocyanide and methyl cyanide.
abstract: Ion-molecule reactions involving methyl isocyanide and methyl cyanide have been performed in a new rf-only hexapole collision cell inserted in a large-scale tandem mass spectrometer. Beside protonation processes, N-methyl cyanogen ions (CH(3)N(+)CCN) and 1-methyleneiminium-1- ethylenium ions (CH(2)CN(+)CH(2)) have been produced in high yield and fully characterized by high-energy collisional activation. The unimolecular chemistry of the molecular ions of caffeine (1,3,7-trimethyl xanthine) has been revisited on the basis of these new results.
authors.affiliation: University of Mons-Hainaut, Avenue Maistriau 19, B-7000 Mons, Belgium.
authors.forename: Noémie
authors.initials: N
authors.lastname: Dechamps
authors.forename: Robert
authors.initials: R
authors.lastname: Flammang
authors.forename: Michaël
authors.initials: M
authors.lastname: Boulvin
authors.forename: Luc
authors.initials: L
authors.lastname: Lamote
authors.forename: Pascal
authors.initials: P
authors.lastname: Gerbaux
authors.forename: Vu Thi
authors.initials: VT
authors.lastname: Ngan
authors.forename: Minh Tho
authors.initials: MT
authors.lastname: Nguyen