scholarly journals Mass Spectrometric Study of the Primary Processes in Photochemical Reactions. III. Primary Steps in Simple Ketone Photolysis and Mass Spectrum of Acetyl Radical

1976 ◽  
Vol 49 (1) ◽  
pp. 188-190 ◽  
Author(s):  
Shigeru Yamashita
Keyword(s):  
Mass Spectrum ◽  
Mass Spectrometric Study ◽  
Photochemical Reactions ◽  
Mass Spectrometric ◽  
Spectrometric Study ◽  
Acetyl Radical

MASS SPECTROMETRIC STUDY OF SUBLIMING SELENIUM

1966 ◽  
Vol 44 (24) ◽  
pp. 3063-3071 ◽  
Author(s):  
H. Fujisaki ◽  
J. B. Westmore ◽  
A. W. Tickner
Keyword(s):  
Mass Spectrum ◽  
Thermodynamic Data ◽  
Mass Spectrometric Study ◽  
Mass Spectrometric ◽  
Spectrometric Study ◽  
Temperature Range

In the mass spectrum of the vapor from grey selenium subliming in the temperature range 102 to 187 °C all possible Sen+ ions between n = 1 and n = 8 were detected in measurable quantities. The ions Se5+, Se6+, Se7+, and Se8+ arise mainly from ionization of the corresponding parent molecules, which are believed to be cyclic. At 175 °C the composition of the vapor is Se5 ≤ 29.0%, Se6 ≥ 57.5%, Se7 ≥ 11.4%, and Se8 ≥ 2.0%. Thermodynamic data are reported for the sublimation of these molecules. Small amounts of Se9+ and Se10+ were also detected.

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