
%0 Journal Article
%A Macdonald, CG 
%A Shannon, JS 
%T Studies in Mass Spectrometry. II. Random Hydrogen Rearrangement in Aromatic Molecular Ions
%J Australian Journal of Chemistry
%D 1962/12/01
%V 15
%N 4
%P 771-785
%K 
%R https://doi.org/10.1071/CH9620771
%U https://www.publish.csiro.au/paper/CH9620771 
%X To provide data for investigations by, inter alia, mass-spectrometric methods into the deuterium exchange of the aromatic hydrogen of some coal fractions, a study was made which confirmed the occurrence of completely random hydrogen rearrangement prior to or during the elimination of C2H2 in the molecular ions of benzene-1,2,3-d3, benzene-l,3,5-d3, naphthalene-1,2,3,4-d4, naphthalene-1,4,5,8-d4, and phenanthrene-9,10-d2, and in the phenyl ions derived from o-bromobenzene-d, m-bromobenzene-d, and p-chlorobenzene-d, Similar but incomplete hydrogen rearrangement was found to occur in the molecular ion of carbazole-N-d prior to or during elimination of HCN. Such rearrangements, for which mechanistic considerations are presented, must be taken into account when the mass spectra of deuterium-substituted aromatic compounds are being interpreted. 
