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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 796-813 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Elektron-Donor-Acceptor-Verbindungen, XXXVI Chinone und Chinhydrone der [2.2]- und [3.3]Metaparacyclophan-ReihenDie isomeren Chinhydrone 1 und 2 sowie das Bis(chinon) 6 der [2.2]Metaparacyclophan-Reihe wurden synthetisiert. Vorstufe dieser Verbindungen war das Tetramethoxy[2.2]metaparacyclophan 3, das über 4 und 5 dargestellt wurde. Röntgen-Strukturanalysen von 1, 3 und 6 werden im Hinblick auf die sterische Spannung dieser Moleküle und die Donor-Acceptor-Orientierung in 1 diskutiert. Charge-transfer-Absorptionen von 1 und 2 werden ebenso behandelt wie der Circulardichroismus von 1, das in Enantiomere getrennt werden konnte.  -  Auf analogem Wege wurden die isomeren Chinhydrone 13 und 14 sowie das Bis(chinon) 15 der [3.3]Metaparacyclophan-Reihe dargestellt. Der Unterschied in der sterischen Spannung zwischen den [3.3]- und [2.2]-Metaparacyclophan-Reihen wird auf der Grundlage der Röntgen-Strukturanalyse von 13 diskutiert. Charge-transfer-Absorptionen von 13 und 14 werden angegeben.
    Notes: The isomeric quinhydrones 1 and 2 as well as the bis(quinone) 6 of the [2.2]metaparacyclophane series were synthesized. Precursor of these products was the tetramethoxy[2.2]metaparacyclophane 3 which was prepared via 4 and 5. X-ray structure analyses of 1, 3 and 6 are discussed with regard to the steric strain in these molecules and the donor-acceptor orientation in 1. Charge-transfer absorptions of 1 and 2 are reported as well as circular dichroism of 1 which was separated into enantiomers.  -  Following an analogous route the isomeric quinhydrones 13 and 14 as well as the bis(quinone) 15 of the [3.3]metaparacyclophane series were prepared. The difference in steric strain of the [3.3]- in comparison to the [2.2]metaparacyclophane series is discussed on the basis of an X-ray structure analysis of 13. Charge-transfer absorptions of 13 and 14 are reported.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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