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  • 1960-1964  (2)
  • 1962  (2)
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  • 1960-1964  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Lösungsmitteleffekte in kernmagnetischen Protonenresonanzspektren von substituierten Benzolen (1962)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 45 (1962), S. 568-580 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The solvent effects of acetone and benzene in the proton resonance spectra of substituted benzene molecules can be divided into contributions from the individual substituents. These additive contributions are measured. There are departures from additivity in ortho-disubstituted benzene. The solvent effects thus measured can be used to predict solvent effects in mono- and polysubstituted benzene as long as there is negligible interaction between the substituents.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19620450220
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    17O-Kernresonanz Untersuchungen an Benzofurazanoxid (1962)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 45 (1962), S. 504-506 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 17O-NMR spectra of benzofurazan oxide at room temperature show two resonance lines. This adds evidence to support the N-oxide structure to be correct. The 17O spectra are dependent on temperature, due to an equilibration. The average lifetime of the tautomers is of the order of 10-4 s at + 45°C. The activation energy of the equilibrium is found to be 17,2 ± 1,5 kcal/mole and the frequency factor is 3 · 1014 to 3 · 1016 s-1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19620450213
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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