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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 3915-3925 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Novel Photochromic Systems: Tetra-, Hexa-, and OctahydroindolizinesIn this paper novel spiro-tetra- (5,5′), spiro-hexa- (6), and spiro-octahydroindolizines (7) are presented. The synthesis of 5,5′, 6a, b, and 7 is described. LIS are employed for structure elucidation. UV kinetics - especially flash spectroscopy - demonstrate that a reversible electrocyclic reaction of the tetrahydroindolizines 5 is responsible for the photochromic properties of 5.5′h is an exception, whereas 6a, b, and 7 are not photochromic at all.
    Notes: In dieser Arbeit werden neuartige Spiro-tetra- (5,5′), Spiro-hexa- (6) und Spiro-octahydroindolizine (7) vorgestellt. Die Synthese von 5,5′, 6a, b und 7 wird beschrieben. Lanthanoidenverschiebungen werden zur Strukturermittlung eingesetzt. UV-Kinetische - insbesondere blitzspektroskopische - Studien zeigen, daß die reversible elektrocyclische Reaktion der Tetrahydroindolizine 5 für die Photochromie verantwortlich ist. Eine Ausnahme bildet 5′h; 6a, b und 7 sind nicht mehr photochrom.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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