Negative-ion electrospray mass spectra of carbon dioxide-protectedN-heterocyclic anions

2002 ◽  
Vol 37 (5) ◽  
pp. 541-543 ◽  
Author(s):  
J�rgen H. Gross ◽  
Anke Eckert ◽  
Walter Siebert
Keyword(s):  
Carbon Dioxide ◽  
Mass Spectra ◽  
Negative Ion

scholarly journals Discrimination of structural isomers of amphetamine using carbon dioxide negative-ion chemical ionization mass spectrometry

1997 ◽  
Vol 13 (2) ◽  
pp. 151-161 ◽  
Author(s):  
Kevin B. Thurbide ◽  
C. M. Elson ◽  
P. G. Sim
Keyword(s):  
Carbon Dioxide ◽  
Mass Spectra ◽  
Chemical Ionization ◽  
Negative Ion ◽  
Ionization Mass ◽  
Structural Isomers ◽  
Mass Spectral ◽  
Negative Ion Chemical Ionization ◽  
Spectral Behaviour ◽  
Carbon Dioxide Plasma

The negative‒ion chemical ionization mass spectra of a group of structural isomers of amphetamine have been studied using carbon dioxide as the reagent gas. Characteristic and reproducible differences are observed for each member of the set implying that this technique offers a means of distinguishing among groups of amphetamine isomers. Characteristic adducts to the molecular ion are observed in the form (M–[H]+[O]) and (M–[H]+[CO2]). Descriptions of some fragments are given based on the mass spectral behaviour of a set of analogue compounds and the results of oxygen-18 labelled carbon dioxide reagent gas experiments. Contents of the carbon dioxide plasma and their impact on various analytes is also discussed.

Negative ion mass spectra of organometallic compounds; electron capture-induced decarbonylation of an ester group in a π-arene metal carbonyl

1974 ◽  
pp. 1004-1005 ◽  
Author(s):  
Michael R. Blake ◽  
Ian W. Fraser ◽  
John L. Garnett ◽  
Ian K. Gregor ◽  
Ronald Levot
Keyword(s):  
Electron Capture ◽  
Mass Spectra ◽  
Metal Carbonyl ◽  
Organometallic Compounds ◽  
Ester Group ◽  
Negative Ion

The monomeric metaphosphate anion in negative-ion chemical-ionization mass spectra of phosphotriesters

1984 ◽  
Vol 106 (23) ◽  
pp. 6877-6883 ◽  
Author(s):  
Seymour Meyerson ◽  
Donald J. Harvan ◽  
J. Ronald Hass ◽  
Fausto Ramirez ◽  
James F. Marecek
Keyword(s):  
Mass Spectra ◽  
Chemical Ionization ◽  
Negative Ion ◽  
Ionization Mass ◽  
Negative Ion Chemical Ionization

Electron impact studies. VI. Mass spectra of esters and thioesters. Skeletal rearrangement on electron impact

1967 ◽  
Vol 20 (4) ◽  
pp. 689 ◽  
Author(s):  
JH Bowie ◽  
RG Cooks ◽  
P Jakobsen ◽  
S Lawesson ◽  
G Schroll
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
High Resolution ◽  
Electron Impact ◽  
Mass Spectra ◽  
Skeletal Rearrangement ◽  
Unsaturated Esters ◽  
Impact Studies ◽  
Unsaturated Alcohols ◽  
Metastable Ions

The mass spectra of representative series of simple alkyl acetoacetates, alkyl acetothioacetates, and some unsaturated esters derived from unsaturated alcohols or phenols are reported and discussed. The fragmentation schemes have been established by high resolution measurements, appropriate metastable ions, and by deuterium and 18O labelling. Many of the spectra show significant skeletal rearrangement fragments arising from either loss of carbon monoxide or carbon dioxide.

Comparison of negative ion electrospray mass spectra measured by seven tandem mass analyzers towards library formation

2007 ◽  
Vol 22 (2) ◽  
pp. 101-108 ◽  
Author(s):  
Kateřina Volná ◽  
Michal Holčapek ◽  
Lenka Kolářová ◽  
Karel Lemr ◽  
Josef Čáslavský ◽  
...  
Keyword(s):  
Mass Spectra ◽  
Negative Ion ◽  
Tandem Mass

Electron impact studies. CI—negative ion mass spectra of the carbonyl group. The ArylCH2CO- and Aryl(CH2)2CO- systems

1975 ◽  
Vol 10 (12) ◽  
pp. 1117-1124 ◽  
Author(s):  
John H. Bowie ◽  
Sompong Janposri
Keyword(s):  
Electron Impact ◽  
Carbonyl Group ◽  
Mass Spectra ◽  
Negative Ion ◽  
Impact Studies
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