title: Loss of isocyanic acid from the internal oxadiazole ring of protonated molecules of some 2,5-diaryl-1,3,4-oxadiazoles.
abstract: The fragmentation pattern of some protonated 2,5-diaryl-1,3,4-oxadiazoles is discussed. An unusual decomposition consisting of elimination of the isocyanic acid molecule from the internal oxadiazole ring was found. This fragmentation pathway was deduced on the basis of B/E linked scan mass spectra of metastable ions with liquid secondary ion mass spectrometry as the ionization method and also of low-energy CID mass spectra where electrospray was used as the ionization technique. High resolution measurements were also performed.
authors.affiliation: Adam Mickiewicz University, Faculty of Chemistry, Grunwaldzka 6, 60-780 Poznań, Poland. franski@main.amu.edu.pl
authors.forename: Rafał
authors.initials: R
authors.lastname: Frański
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Schroeder
authors.forename: Volodymir
authors.initials: V
authors.lastname: Rybachenko
authors.forename: Oles P
authors.initials: OP
authors.lastname: Szwajka