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  • 1
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary To assist the investigation of oxidation products of sulphur compounds in high-boiling crude oil fractions, the mass spectra of several bisanellated thiophenediones were recorded with a mass spectrometer using 70 eV electron impact. The model substances were seven bisanellated dicyclopenta[b,d]thiophenediones, the benzo- (with and without methyl substituents), naphtho- and thieno-systems being anellated. Spectra were interpreted for both neutral fragmentation and double-charged ions. All thiophenediones yield a high proportion of molecular ions, and show characteristic fragmentation, especially the loss of CO and CO + CS.
    Notes: Zusammenfassung 70 eV EI-Massenspektren von bisanellierten Thiophendionen, die als Modellsubstanzen für Oxidationsprodukte von Schwefelverbindungen in hochsiedenden Erdölfraktionen in Frage kommen, werden diskutiert. Bei den Modellsubstanzen handelt es sich um sieben bisanellierte Dicyclopenta[b,d]thiophendione. Anelliert sind das Benzo-(mit und ohne Methylsubstituenten), Naphtho- und Thieno-System. Die Spektren werden anhand der Neutralbruchstückabspaltung und der doppeltgeladenen Ionen interpretiert. Alle Thiophendione zeichnen sich durch hohe Molekülionenanteile und charakteristische Abspaltungen, insbesondere CO und CO + CS, aus.
    Type of Medium: Electronic Resource
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