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  • 1980-1984  (3)
  • 1
    Electronic Resource
    Electronic Resource
    13C and 1H chemical shifts in 2-benzylidene[3]ferrocenophane-1,3-diones. Elucidation of the substituent dependence of carbonyl chemical shifts in different carbonyl derivatives (1983)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 21 (1983), S. 429-432 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 13C and 1H chemical shifts of the ferrocene moiety, as well as the carbonyl carbons and styrene moiety, of substituted 2-benzylidene[3]ferrocenophane-1,3-diones have been assigned. Correlations of 13C substituent chemical shifts of both carbonyl carbons with the Hammett constants have been found, and the effect of the transmission of substituent effects on these chemical shifts through the styrene moiety is discussed. An explanation is given for the different sensitivities of the carbonyl carbon chemical shifts to the electronic effect of substituents in mono- and dicarbonyl derivatives.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/omr.1270210706
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Investigation of substituent effects on the 1H NMR spectra of chalcones (1980)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 14 (1980), S. 138-140 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1H NMR spectra of 26 substituted chalcones (3-aryl-1 phenyl-2-propene-1-ones and 1-aryl-3-phenyl-2-propene-1-ones) have been studied. The chemical shifts of the α and β protons to the carbonyl group were correlated with Hammett s̰ parameters. To gain information on the effect of the transmission of the resonance and inductive contributions of the substituents on the chemical shifts of H-α and H-β, two parameter correlations with f and r parameters were also perfomed. The chemical shifts of the aromatic protons of the para-disubstituted benzene ring correlated with the ai substituent increments.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270140212
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Investigation of substituent effects on the 1H and 13C NMR spectra of ferrocene analogues of chalcones (1980)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 14 (1980), S. 181-185 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The transmission of electronic effects across the ferrocene analogues of chalcones [3-aryl-1-ferrocenyl-2-propene-1-ones (series 1) and 1-aryl-3-ferrocenyl-2-propene-1-ones (series 2)], as well as the conformations of both types of ferrocene analogues have been studied. The ferrocene analogues of chalcones of series 1 were found to be in a non-planar conformation. Their H-α and C-α chemical shifts are more sensitive to the resonance than to the inductive effects of substituents. The C-α chemical shifts of the ferrocene analogues of chalcones of series 2 are more sensitive to the inductive than to the resonance effects of substituents. The transmission of the substituent effects to the ferrocene moiety is also briefly discussed.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270140307
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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