Untersuchungen zur Thiol/En-Polymerisation: elektronenspinresonanzspektroskopischer Nachweis spontaner Radikalbildung

Authors

  • Steffi Sensfuß,

    1. Friedrich-Schiller-Universität Jena, Institut für Organische Chemie und Makromolekulare Chemie, Humboldtstraße 10, O-6900 Jena
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  • Manfred Friedrich,

    1. Friedrich-Schiller-Universität Jena, Institut für Organische Chemie und Makromolekulare Chemie, Humboldtstraße 10, O-6900 Jena
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  • Elisabeth Klemm

    Corresponding author
    1. Friedrich-Schiller-Universität Jena, Institut für Organische Chemie und Makromolekulare Chemie, Humboldtstraße 10, O-6900 Jena
    • Friedrich-Schiller-Universität Jena, Institut für Organische Chemie und Makromolekulare Chemie, Humboldtstraße 10, O-6900 Jena
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Abstract

By means of ESR (electron spin resonance) spectroscopic investigations it is shown, that in dithiol/diene-mixtures, in the absence of daylight and oxygen, radicals are formed spontaneously. Using the spin trapping technique and nitrosodurene (ND) as the trapping agent the existence of sulfur and carbon radicals could be proved unambiguously. Oxygen has no significant influence on the reaction. Spin trapping experiments have shown, that the aliphatic dithiols investigated do not form any traceable quantity of RS. and .OOH radicals in the presence of air. Radicals are detected only after addition of an ene-compound.

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