scholarly journals Fragmentation pathways of tungsten hexacarbonyl clusters upon electron ionization

2016 ◽  
Vol 145 (5) ◽  
pp. 054301 ◽  
Author(s):  
M. Neustetter ◽  
E. Jabbour Al Maalouf ◽  
P. Limão-Vieira ◽  
S. Denifl
Keyword(s):  
Electron Ionization ◽  
Tungsten Hexacarbonyl ◽  
Fragmentation Pathways

scholarly journals Complete ligand loss in electron ionization of the weakly bound organometallic tungsten hexacarbonyl dimer

2016 ◽  
Vol 18 (15) ◽  
pp. 9893-9896 ◽  
Author(s):  
Michael Neustetter ◽  
Andreas Mauracher ◽  
Paulo Limão-Vieira ◽  
Stephan Denifl
Keyword(s):  
Valence Bond ◽  
Electron Ionization ◽  
Intermolecular Bond ◽  
Weakly Bound ◽  
Tungsten Hexacarbonyl

Electron ionization of the weakly bound tungsten hexacarbonyl dimer leads to a transformation of the weak intermolecular bond into a strong valence bond.

Reduction Reactions in the Ion Source in Electron Ionization Mass Spectrometry

2020 ◽  
Vol 75 (13) ◽  
pp. 1685-1692
Author(s):  
D. M. Mazur ◽  
M. E. Zimens ◽  
Th. B. Latkin ◽  
N. V. Ul’yanovskii ◽  
V. B. Artaev ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Ion Source ◽  
Electron Ionization ◽  
Electron Ionization Mass Spectrometry ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Reduction Reactions

A novel rearrangement in the gas phase under electron ionization for 3-glycosyl-5-aryl-2-isoxazolines

1999 ◽  
Vol 34 (9) ◽  
pp. 915-921 ◽  
Author(s):  
Norma D’Accorso ◽  
Mirta Fascio ◽  
Carlos Gustavo Arabehety ◽  
Alicia M. Seldes
Keyword(s):  
Gas Phase ◽  
Electron Ionization

scholarly journals IR photofragmentation of the phenyl cation: spectroscopy and fragmentation pathways

2021 ◽  
Vol 23 (7) ◽  
pp. 4334-4343
Author(s):  
Sandra D. Wiersma ◽  
Alessandra Candian ◽  
Joost M. Bakker ◽  
Giel Berden ◽  
John R. Eyler ◽  
...  
Keyword(s):  
Gas Phase ◽  
Spectral Range ◽  
Infrared Spectra ◽  
Fragmentation Pathways ◽  
Phenyl Cation

We present the gas-phase infrared spectra of the phenyl cation, phenylium, in its perprotio (C6H5+) and perdeutero (C6D5+) forms, in the 260–1925 cm−1 (5.2–38 μm) spectral range, and investigate the observed photofragmentation.

scholarly journals Characterization and Study on Fragmentation Pathways of a Novel Nerve Agent, ‘Novichok (A234)’, in Aqueous Solution by Liquid Chromatography–Tandem Mass Spectrometry

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1059
Author(s):  
Jin Young Lee ◽  
Kyoung Chan Lim ◽  
Hyun Suk Kim
Keyword(s):  
Mass Spectrometry ◽  
Aqueous Solution ◽  
Liquid Chromatography ◽  
Degradation Products ◽  
Aqueous Sample ◽  
Tandem Mass ◽  
Aqueous Samples ◽  
Fragmentation Pathways ◽  
Chromatography Tandem Mass Spectrometry ◽  
Liquid Chromatography Tandem Mass

As a first step toward studying the properties of Novichok (ethyl (1-(diethylamino)ethylidene)phosphoramidofluoridate (A234)), we investigated its degradation products and fragmentation pathways in aqueous solution at different pH levels by liquid chromatography–tandem mass spectrometry. A234 was synthesized in our laboratory and characterized by nuclear magnetic resonance spectroscopy. Three sets of aqueous samples were prepared at different pH levels. A stock solution of A234 was prepared in acetonitrile at a concentration of 1 mg/mL and stored at −20 °C until use. Aqueous samples (0.1 mg/mL) were prepared by diluting the stock solution with deionized water. The acidic aqueous sample (pH = 3.5) and basic aqueous sample (pH = 9.4) were prepared using 0.01 M acetic acid and 0.01 M potassium carbonate, respectively. The analysis of the fragmentation patterns and degradation pathways of A234 showed that the same degradation products were formed at all pH levels. However, the hydrolysis rate of A234 was fastest under acidic conditions. In all three conditions, the fragmentation pattern and the major degradation product of A234 were determined. This information will be applicable to studies regarding the decontamination of Novichok and the trace analysis of its degradation products in various environmental matrices.

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