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  • 1975-1979  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 1789-1797 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transanular Interactions in [2.2]Phanes, XII: Chiral and Achiral [2.2](1,5)NaphthalenophaneThe diastereomeric [2.2](1,5)naphthalenophanes, achiral 3 and chiral 4, were synthesized via the corresponding dithia[3.3]phanes 8 and 9. The originally proposed structure assignment of the two diastereomers2) has to be corrected on the basis of the 1H NMR spectra at 360 MHz and the X-ray structure analysis of 3. An orientation dependence of the transanular interaction is found in the absorption and emission spectra as well as for the zero field splitting parameters of the excited triplet states of 3 and 4.
    Notes: Die diastereomeren [2.2](1,5)Naphthalinophane, achirales 3 und chirales 4, wurden über die entsprechenden Dithia[3.3]phane 8 und 9 synthetisiert. Die ursprünglich getroffene Strukturzuordnung der beiden Diastereomeren2) muß aufgrund der 1H-NMR-Spektren bei 360 MHz und der Röntgenstrukturanalyse von 3 korrigiert werden. Die Absorptions- und Emissionsspektren sowie die Nullfeld-Aufspaltungs-Parameter der angeregten Triplettzustände von 3 und 4 lassen eine Orientierungsabhängigkeit der transanularen Wechselwirkung erkennen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 249-259 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transanular Interactions in [3.3]Phanes, III. [3.3]Paracyclophane, New Syntheses, Chair and Boat Conformation[3.3]Paracyclophane (1) was synthesized via the 2,13-dithia[4.4]paracyclophane (2) by vapor phase pyrolysis of the disulfone 3 obtained from 2. Reaction of 2 with benzyne gave trans- and cis-2,1 l-bis(phenylthio)[3.3]paracyclophane (4 and 5) by Stevens rearrangement. Oxidation to the sulfoxides 6 and 7 and pyrolysis yielded the [3.3]paracyclophanedienes (12/13) giving 1 on catalytic hydrogenation. Large substituents in the 2,11-positions of the bridges stabilize the two conformers of 1, based on 1H-NMR spectra the trans-isomer 4 has the chair, the cis-isomer 5 the boat conformation.
    Notes: [3.3]Paracyclophan (1) wurde über 2,13-Dithia[4.4]paracyclophan (2) durch Gasphasen-Pyrolyse des aus 2 erhaltenen Disulfons 3 synthetisiert. Reaktion von Dehydrobenzol mit 2 ergab durch Stevens-Umlagerung trans- und cis-2,11-Bis(phenylthio)[3.3]paracyclophan (4 und 5); durch Oxidation zu den Sulfoxiden 6 und 7 und Pyrolyse wurden die [3.3]Paracyclophandiene (12/13) erhalten, die bei katalytischer Hydrierung 1 ergaben. Große Substituenten in den 2,11-Positionen der Brücken stabilisieren die beiden Konformere von 1, laut 1H-NMR-Spektren liegt das trans-Isomere 4 in der Sessel-, das cis-Isomere 5 in der Wannen-Konformation vor.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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