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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 541-549 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die [2.2]Paracyclophane 1-4, die Tetracyanbenzol(TCNB)-Einheiten gegenüber von verschiedenen Elektron-Donor-Komponenten enthalten, wurden über die entsprechend substituierten Dithia[3.3]paracyclophane 8, 10, 12, und 14. synthetisiert. Für die Pyrolyse der davon abgeleiteten Disulfone 9, 11, 13 und 15 mußte wegen der sehr niedrigen Flüchtigkeit dieser Verbindungen eine Modifikation der konventionellen Pyrolyse-Methode benutzt werden. - Die Synthesen der [3.3]Paracyclophane 16-18 über die Dithia[4.4]paracyclophane 19, 21 und 23 und die entsprechenden Disulfone 20, 22 und 24 und werden beschrieben. Die [4.4]Paracyclophane 32 und 33 wurden aus den betreffenden Dithia[5.5]paracyclophanen 34 und 36 durch Pyrolyse der disulfone 35 und 37 dargestellt. - Als Cyclisierungskomponenten für die Synthese der erwähnten Dithiaparacyclophane wurden verschiedene neue 1,4-Bis(mercaptoalkyl)benzole mit Elektron-Donor-substituenten sowie das TCNB-Derivat 5 dargestellt.
    Notes: [2.2]Paracyclophanes 1-4 containing tetracyanobenzene (TCNB) units opposite to different electron donor components have been synthesized via the corresponding substituted dithia[3.3]paracyclophanes 8, 10, 12, and 14. For the pyrolysis of the disulfones 9, 11, 13, and 15 derived therefrom, due to the very low volatility of these compounds, a modification of the conventional pyrolysis method had to be used. - The syntheses of [3.3]paracyclophanes 16-18 via the dithia[4.4]paracyclophanes 19, 21, and 23 and the corresponding disulfones 20, 22, and 24 are described. [4.4]Paracyclophanes 32 and 33 were prepared from the respective dithia[5.5]paracyclophanes 34 and 36 by pyrolysis of the disulfones 35 and 37. - As cyclisation components for the synthesis of the mentioned dithiaparacyclophanes several new 1,4-bis(mercaptoalkyl)benzenes with electron-donating substituents were prepared as was the TCNB derivative 5.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 581-584 
    ISSN: 0009-2940
    Keywords: Vinylferrocene ; Pd-catalyzed twofold and fourfold couplings ; Electron-donor-acceptor[2.2]paracyclophanes ; Charge transfer ; Cyclic voltammetry ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: As potential nonlinear optical material. 12-nitro-4,7-bis(2-ferrocenylvinyl)[2.2]paracyclophane (1) and 12-nitro-4,5,7,8-tetrakis(2-ferrocenylvinyl)[2.2]paracyclophane(2) have been synthesized by pd-catalyzed coupling reactions of vinylferrocene with the precursor cyclophanes 9 and 13, respectively. The absorption and electrochemical properties of 1 and 2 are also described.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die Molekülstrukturen der Elektron-Donor-Acceptor-[2.2]- und -[3.3]Paracyclophane 1, 2, 4, 6, 10 und 11 werden im Hinblick auf sterische und elektronische Effekte auf der Grundlage von Röntgen-Strukturanalysen diskutiert. Die Charge-Transfer-Absorptionen von 1-9 wurden bestimmt; sie werden in Beziehung zur Variation der Elektron-Donor-Stärke und des Donor-Acceptor-Abstands behandelt.
    Notes: Based on X-ray analyses the molecular structures of the electron donor-acceptor [2.2]- and [3.3]paracyclophanes 1, 2, 4, 6, 10, and 11 are discussed in terms of steric and electronic effects. The charge-transfer absorptions of 1-9 were measured and are dealt with in correlation to the variation of the strength of the electron donors and of the donor-acceptor distances in the series 1-9.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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