Fast radical reactions in a mass spectrometer ion source: radical addition to 7,7,8,8-tetracyanoquinodimethane

1979 ◽  
Vol 101 (21) ◽  
pp. 6470-6472 ◽  
Author(s):  
C. N. McEwen ◽  
M. A. Rudat
Keyword(s):  
Mass Spectrometer ◽  
Radical Addition ◽  
Ion Source ◽  
Radical Reactions

scholarly journals Interaction of Fullerenes with Organosilanes in the Ionization Chamber of a Mass Spectrometer under Electron Impact and the Reaction of C60with Tetraphenylsilane in Solution under UV Irradiation

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Yury I. Lyakhovetsky ◽  
Elena A. Shilova ◽  
Alexandra P. Pleshkova ◽  
Alexander I. Belokon ◽  
Sergey O. Yakushin ◽  
...  
Keyword(s):  
Electron Impact ◽  
Mass Spectrometer ◽  
Uv Irradiation ◽  
Ionization Chamber ◽  
Ion Source ◽  
Organic Radicals ◽  
Mechanistic Study ◽  
Mass Spectral ◽  
Additional Support ◽  
Derivatives Of

C60was shown to react with organosilanes Me4Si, Ph2SiH2, Ph2MeSiH, Ph4Si, andα-naphthylphenylmethylsilane in the electron ionization ion source of a mass spectrometer with the transfer of the corresponding organic radicals (Me, Ph, andα-naphthyl) from the silanes to the fullerene. The reactions were accompanied by hydrogen addition to some products and hydrogen loss from them. C70reacted with Me4Si analogously. A reaction mechanism involving homolytic dissociation of the silanes under electron impact to the corresponding organic radicals, which react further with C60at the surface of the ionization chamber of the mass spectrometer to give the respective adducts, was offered. A mechanistic study of the reaction of C60with Me4Si supported it. No silicon containing derivatives of the fullerenes were found. C60reacted with Ph4Si in solution under UV irradiation in a similar fashion furnishing phenyl derivatives of the fullerene. These results provide an additional support to the hypothesis formulated earlier thatthe homolytic reactive mass spectrometry of fullerenes (the reactions of fullerenes with other species in the ionization chambers of mass spectrometers and their mass spectral monitoring)can predict the reactivity of them toward the same reagents in solution to a significant extent.

scholarly journals Development of New Type Ion Source of Quadrupole Type Mass Spectrometer for UF6Analysis

1980 ◽  
Vol 17 (9) ◽  
pp. 687-693
Author(s):  
Yuukou NAGATORO ◽  
Ken-ichi OCHIAI ◽  
Akira KAYA
Keyword(s):  
Mass Spectrometer ◽  
Ion Source ◽  
New Type ◽  
Type Mass

The gas phase reactivity of the dimethylchloronium ion with alkylbenzenes

1981 ◽  
Vol 59 (15) ◽  
pp. 2412-2416 ◽  
Author(s):  
John A. Stone ◽  
Margaret S. Lin ◽  
Jeffrey Varah
Keyword(s):  
High Pressure ◽  
Gas Phase ◽  
Mass Spectrometer ◽  
Aromatic Hydrocarbons ◽  
Relative Rate ◽  
Ion Source ◽  
Nucleophilic Displacement ◽  
Rate Of Reaction ◽  
Displacement Reactions ◽  
Bonded Complexes

The reactivity of the dimethylchloronium ion with a series of aromatic hydrocarbons has been studied in a high pressure mass spectrometer ion source using the technique of reactant ion monitoring. Benzene is unreactive but all others, from toluene to mesitylene, react by CH3+ transfer to yield σ-bonded complexes. The relative rate of reaction increases with increasing exothermicity in line with current theories of nucleophilic displacement reactions.

Improvement of the Ion Transmission in a Typical Mass Spectrometer Ion Source

1963 ◽  
Vol 34 (8) ◽  
pp. 2486-2487 ◽  
Author(s):  
Robert J. Conzemius ◽  
Harry J. Svec
Keyword(s):  
Mass Spectrometer ◽  
Ion Source ◽  
Ion Transmission

Visible-light-facilitated P-center radical addition to C=X (X = C, N) bonds results in cyclizations

2021 ◽  
Author(s):  
Shang-Dong Yang ◽  
Chong Li ◽  
Juan Wang
Keyword(s):  
Visible Light ◽  
Organophosphorus Compounds ◽  
Radical Addition ◽  
Radical Reactions

Visible-light-facilitated phosphorus radical reactions have been developed as a powerful and sustainable tool for the synthesis of various organophosphorus compounds. In general, these reactions require stoichiometric amounts of oxidants, and...

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