Ion—Molecule Reactions by a Photoionization Mass Spectrometer. I. Propylene and 1,3-Butadiene

Ion—molecule reactions in propylene and 1,3-butadiene have been studied using a mass spectrometer which utilizes photoionization as an ion source instead of electron impact. The light source used was a low-pressure hydrogen-discharge lamp with a LiF window (substantially Lyman alpha, 1216 A). It has been shown that this method has two major advantages in the study of ion—molecule reactions compared with the electron-impact method; one is the lack of unimolecular fragmentation of the parent ion and the other the absence of hot filament, which enables one to get high pressure without suffering pyrolysis.Five reactions of C3H6+ with C3H6 and eight reactions of C4H6+ with C4H6 have been identified and the cross sections determined for these reactions. In propylene, the reaction leading to the formation of C3H7+ was found to be of the largest cross section and, although cross section was small, the reaction forming C3H3+ was found as a new reaction. It was shown that C3H6+ could not be the precursor of seconda...

[1]  F. A. Elder,et al.  Electron Affinity of Oxygen , 1965 .

[2]  F. H. Field,et al.  High Pressure Mass Spectrometric Study of Alkanes1 , 1964 .

[3]  C. E. Melton,et al.  APPEARANCE POTENTIALS BY THE RETARDING POTENTIAL-DIFFERENCE METHOD FOR SECONDARY IONS PRODUCED BY EXCITED-NEUTRAL, EXCITED ION-NEUTRAL, AND ION-NEUTRAL REACTIONS , 1964 .

[4]  F. Comes,et al.  Das lonisationskontinuum von Helium, Neon und Argon* , 1964 .

[5]  V. H. Dibeler,et al.  Mass Spectrometric Study of the Photoionization of Acetylene and Acetylene‐d2 , 1964 .

[6]  I. Tanaka,et al.  Lyman Alpha Lamps and Reaction of Deuterium Atoms in the 2P State with Molecular Nitrogen , 1964 .

[7]  A. G. Harrison.  CONCURRENT ION–MOLECULE REACTIONS IN ETHYLENE AND PROPYLENE , 1963 .

[8]  W. Bartley,et al.  On the Strain Energy in Cyclopropene and the Heat of Formation of the C3H3+Ion , 1962 .

[9]  D. C. Frost,et al.  THE PHOTOIONIZATION OF NITROGEN DIOXIDE , 1962 .

[10]  E. Schönheit.  Notizen:Massenspektrometrische Untersuchung der Photoionisation von Argon , 1961 .

[11]  R. Barker,et al.  Ion–Molecule Reactions of 1,3-Butadiene, of Acetylene and of Acetylene–Methane Mixtures , 1959 .

[12]  G. R. Cook,et al.  Photoionization Analysis by Mass Spectroscopy , 1959 .

[13]  F. W. Lampe,et al.  Reactions of Gaseous Ions. VI. Hydride Ion Transfer Reactions , 1958 .

[14]  Leonard Muldawer,et al.  Electron impact phenomena: by F. H. Field and J. L. Franklin. 349 pages, diagrams, 6 × 9 in.New York, Academic Press, Inc., 1957. Price, $8.50 , 1958 .

[15]  F. F. Marmo,et al.  Mass Spectroscopic Determination of Photoionization Products , 1957 .

[16]  J. D. Morrison,et al.  Study of Photoionization Efficiencies Using a Mass Spectrometer , 1957 .

[17]  E. Schönheit.  Massenspektroskopische Untersuchungen der Photoionisation in Gasen , 1957 .

[18]  I. Tanaka,et al.  Photoionization as a Source of Ions for Mass Spectrometry , 1956 .

[19]  D. Stevenson,et al.  Reactions of Gaseous Molecule Ions with Gaseous Molecules. II , 1956 .