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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 2770-2784 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Modified Tetrahelicene SystemsWith the aid of temperature dependent 1H n. m. r. spectra the racemization barriers of the triply hydrogenated tetrahelicene analogues 7, 13, and 20 have been determined as 15-16 kcal/mol. For a comparable monohydrogenated derivative 24 a barrier of only 10.3 kcal/mol was found.
    Notes: Die Racemisierungsbarrieren der dreifach hydrierten Tetrahelicen-Analoga 7, 13 und 20 wurden mittels temperaturabhängiger 1H-NMR-Spektren zu 15-16 kcal/mol bestimmt. Für ein vergleichbares monohydriertes Derivat 24 fand man eine Barriere von nur 10.3 kcal/mol.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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