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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 144-162 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transanular Interaction in [m. n]Phanes, 27. Models for Excimers and Exciplexes: [2.2]Phanes of Fluorene, 9-Fluorenone, and 9-Fluorenyl Anionanti- and syn-[2.2](2,7)-fluorenophane (1, 2) as well as their 5,16-dioxo and 5-oxo derivatives 3, 5, and 6 containing two or one 9-fluorenone units were synthesized: Cyclisation of the bis(bromomethyl) compounds 7 and 10 with the bis(mercaptomethyl) compounds 9 and 12 gave the dithia[3.3]phanes 14, 16, and 18 containing fluorene and 9-fluorenone units bridged at the 2,7-positions. Oxidation to the disulfones 15, 17, and 18 and vapour phase pyrolysis (500°C, 0.1 Torr) led to 1/2, 3, and 5/6, respectively. The molecular geometry of 1 was determined by X-ray structure analysis. On treatment of suspensions of 1 and 2 in hexamethylphosphoric triamide with n-butyllithium in n-hexane red solutions of the dianions 21 and 22 were generated, which were characterized by 1H NMR spectroscopy. With deuterium oxide the dianion 22 yielded [exo-5, exo-16-D2]-anti-[2.2](2,7)fluorenophane (24), with methyl iodide exo-5, exo-16-dimethyl-anti-[2.2](2,7)fluorenophane (26). Multiple metalation with n-butyllithium and reaction with methyl iodide led to 5,5,16,16-tetramethyl-anti-[2.2](2,7)fluorenophane (27).
    Notes: anti- und syn-[2,2](2,7)Fluorenophan (1, 2) sowie ihre 5,16-Dioxo- und 5-Oxoverbindungen 3, 5 und 6 mit zwei bzw. einer 9-Fluorenon-Einheit wurden synthetisiert: Cyclisierung der Bis(brommethyl)-Verbindungen 7 und 10 mit den Bis(mercaptomethyl)-Verbindungen 9 und 12 ergab die Dithia[3.3]phane 14, 16 und 18 mit in 2,7-Position verbrückten Fluoren- und 9-Fluorenon-Einheiten. Oxidation zu den Disulfonen 15, 17 und 18 und Gasphasen-Pyrolyse (500°C, 0.1 Torr) führte zu 1/2, 3 bzw. 5/6. Die Molekülgeometrie von 1 wurde durch Röntgenstrukturanalyse bestimmt. Suspensonen von 1 und 2 in Hexamethylphosphorsäuretriamid ergaben mit n-Butyllithium in n-Hexan rote Lösungen der Dianionen 21 und 22, die durch 1H-NMR-Spektroskopie charakterisiert wurden. Aus dem Dianion 22 erhielt man mit Deuteriumoxid [exo-5, exo-16-D2]-anti-[2.2](2,7)Fluorenophan (24), mit Methyliodid exo-5, exo-16-Dimethyl-anti-[2.2](2,7)fluorenophan (26). Mehrfache Metallierung mit n-Butyllithium und Reaktion mit Methyliodid führte zu 5,5,16,16-Tetramethyl-anti-[2.2](2,7)fluorenophan (27).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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