The Rearrangement Peaks Observed in Some Mass Spectra.

Mass Spectrometric Analysis Broad Applicability to Chemical Research

“…THOUGH the primary use of the analytical mass spectrometer has been in routine quantitative analysis of light hydrocarbons, a number of investigators have reported on the unique qualitative and quantitative applications to the general field of chemistry, especially organic chemistry. The analytical advantages of the mass spectrometer for volatile oxygenated compounds (14, 18,21,22,35,36), thiophenes (19), aromatic hydrocarbons (19), lactones (13), acids (16), haloalkanes (1,26,35), amines (7), and metallo-organic compounds (8, 9) have been described. Significance of the spectra of such compounds as ketene dimer (23), pentaborane (10), diborane (28), dimethylphosphinoborine trimer (12), phenol, thiophenol, and aniline (27) has also been discussed.…”

Absolute Rate Theory for Isolated Systems and the Mass Spectra of Polyatomic Molecules

“…The maximum excitation energy available for the parent ions is the electron energy minus the ionization energy of the molecule. The above voltage range would give a variation in the high-energy cut-off of the distribution function between 6 and 50 X [10][11][12] ergs/molecule and corresponding variations in the mean value of the excitation energy. It is hoped that such data will be available shortly and that the validity of this theory can then be definitely demonstrated.…”

DEUTERIUM MIGRATION DURING THE IONIZATION OF 1-BUTENE-4-d3 BY ELECTRON IMPACT

“…These pealts can not be accouilted for by isotopic contributions from CI3. Evidence for rearrangement of hydrogens prior t o dissociation of the corresponding molecule ions has been reported by several workers (1,2,8). Some migration of deuterium atoms is reported in a recent paper on the mass spectra of deuterated butanes (5).…”