scholarly journals Measurement of Negative Ions Formed by Electron Impact. IX. Negative Ion Mass Spectra and Ionization Efficiency Curves of Negative Ions ofm⁄e25, 26, 27, 38, 39, 40 and 50 from Acrylonitrile

1973 ◽  
Vol 46 (8) ◽  
pp. 2273-2277 ◽  
Author(s):  
Satoru Tsuda ◽  
Akira Yokohata ◽  
Toshikatsu Umaba
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Negative Ions ◽  
Ionization Efficiency ◽  
Negative Ion

Negative Ionen durch Elektronenstoß an einigen organischen Schwefelverbindungen

1966 ◽  
Vol 21 (8) ◽  
pp. 1251-1259 ◽  
Author(s):  
K. Jäger ◽  
A. Henglein
Keyword(s):  
Electron Impact ◽  
Electron Capture ◽  
Chemical Reactions ◽  
Hydrogen Sulphide ◽  
Negative Ions ◽  
Ion Source ◽  
Ionization Efficiency ◽  
Dissociative Electron Capture ◽  
Negative Ion ◽  
Electron Affinities

Negative ion formation by electron impact has been studied in hydrogen sulphide, methylmercaptan, phenylmercaptan, benzylmercaptan, allylmercaptan, dimethylthioether, dimethyldisulphide and diallyldisulpbide. Appearance potentials, ionization efficiency curves and the kinetic energies of negative ions were measured by using a Fox ion source. The energies of various dissociative electron capture processses are discussed and electron affinities of some radicals of the types RS and RS2 are derived. Two chemical reactions of the CH2S- ion with dimethyldisulphide have been detected.

Electron impact studies. XCIII. The reactions of negative ions from 3- and 4-nitrophthalic anhydrides

1975 ◽  
Vol 28 (3) ◽  
pp. 563 ◽  
Author(s):  
JH Bowie ◽  
BD Williams
Keyword(s):  
Electron Impact ◽  
Phthalic Anhydride ◽  
Cyclotron Resonance ◽  
Mass Spectra ◽  
Negative Ions ◽  
Negative Ion ◽  
Ion Cyclotron Resonance ◽  
Impact Studies ◽  
Ion Molecule Reactions ◽  
Positive Ions

Possible structures for some rearrangement ions in the negative ion mass spectra of 3- and 4-nitro- phthalic anhydride are suggested from an examination of the + E spectra obtained by the conversion of the negative ions to positive ions by charge-stripping reactions. The reactivities of the non-decomposing negative ions have been investigated by observation of their ion-molecule reactions with the neutral anhydride in the cell of an ion cyclotron resonance spectrometer.

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