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  • 1
    Electronic Resource
    Electronic Resource
    Liquid chromatography/thermospray mass spectrometry of mustard and its metabolites (1995)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 30 (1995), S. 1716-1722 
    Details
    ISSN: 1076-5174
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: There is considerable interest in the detection and analysis of chemical warfare agents. Since thermospray provides soft ionization and interesting fragmentation patterns under discharge conditions, the liquid chromatographic/thermospray mass spectrometric behavior of bis(2-chloroethyl) sulfide and its metabolites was investigated. All of the metabolites except mustard sulfone and thiodiglycol sulfone indicated the presence of a three-membered cyclic sulfonium ion intermediate or its equivalent in their mass spectra. Other observed reactions of the above substrates include polymerizations and nucleophilic substitution reactions.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jms.1190301212
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  • 2
    Electronic Resource
    Electronic Resource
    NMR studies of methylenebispyridinium derivatives (1986)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 24 (1986), S. 743-747 
    Details
    ISSN: 0749-1581
    Keywords: Methylenebispyridinium derivatives ; 1H NMR ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The methylene proton chemical shifts of the system appear to be affected by the synergistic interactions of a combination of various effects. Although it is difficult to single out the origin, transmission and magnitude of these effects, the synergistic interactions pervade the molecule, causing a net displacement of the chemical shifts. The substituent-produced chemical shifts show a clear trend in their dependence on the nature of the substituents and the Hammett parameters. Strong through-conjugation between the aromatic nitrogen and resonance donor substituents in the para-position is observed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260240902
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  • 3
    Electronic Resource
    Electronic Resource
    N-methylene chemical shifts of N-benzylpyridinium salts (1987)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 25 (1987), S. 560-562 
    Details
    ISSN: 0749-1581
    Keywords: chemical shifts ; N-methylene protons ; N-benzylpyridinium salts ; substituent effects ; addivity relationships ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The chemical shifts of N-benzylpyridinium salts have been measured in D2O, and the substituent induced chemical shifts of the methylene protons are in substantial agreement with those expected from the overall electronic effects of the substituents. An additivity effect of the substituents on the methylene resonance is also observed.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260250622
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