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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 2000 (2000), S. 1377-1386 
    ISSN: 1434-193X
    Keywords: Diallenes ; Solid-state reactions ; Naphthocyclobutenes ; Benzodicyclobutadiene ; Through-bond interactions ; X-ray analysis ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: ---The title four-membered ring compounds, naphthocyclobutenes and benzodicyclobutadienes, were produced by thermal cyclization reaction of crystalline 1,2-diallenylbenzenes and 1,6-diethynyldiallenes, respectively. These solid-state reactions proceeded efficiently and stereoselectively. The naphthocyclobutenes were shown to have extremely long C(sp3)-C(sp3) bonds (1.720-1.733 Å). The benzodicyclobutadienes were also shown to have extremely long C(sp2)-C(sp2) bonds (1.540 Å).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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