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  • 14N  (1)
  • conductance  (1)
  • oligomeric dissociation  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The interpretion of electrical conductivity measurements of three monoprotonic acids in fluorosulfuric acid (1990)
    Springer
    Journal of solution chemistry 19 (1990), S. 609-622 
    Details
    ISSN: 1572-8927
    Keywords: Monoprotonic acid ; conductance ; conductometric titration ; fluorosulfate ; equilibrium constant ; oligomeric dissociation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The three metal fluorosulfates Au(SO3F)5 and Ta(SO3F)5 are soluble in fluorosulfuric acid and behave as monoprotonic acids, as is evident from electrical conductivity measurements and conductometric titrations against the base KSO3F. Both the specific conductometric measurements in the concentration range of 0–0.050 mol-kg−1 and the conductometric titration curves are compared to calculated curves. Best fits are achieved by assuming an average degree of association for the Lewis acids of 5 for the Nb-, 3 for the Ta- and 2 for the Au-fluorosulfato species in HSO3F. Dissociation constants are calculated for various association models and a general order of acidity of Au(SO3F)3〉Ta(SO3F)5〉Nb(SO3F)5 is suggested, with association in solution occurring in the reverse order.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00647033
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  • 2
    Electronic Resource
    Electronic Resource
    The 15N-isotopomers of cis- and trans-difluorodiazine; A 19F NMR investigation of the two [AX]2 spin systems of 15N2F2 (1995)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 33 (1995), S. 817-822 
    Details
    ISSN: 0749-1581
    Keywords: NMR ; 19F ; 15N ; 14N ; DSYMPCD ; DCYMPCD ; WIN-DAISY ; N2F2 ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The decomposition of 15N3F at -20°C leads to cis- and trans-15N2F2. The corresponding 19F NMR spectra were analysed as [AX]2 systems. 19F, 15N and 14N NMR spectra were simulated using the novel PC program systems DSYMPCD, DCYMPCD and WIN-DAISY running under WIN-NMR. Stereospecific coupling constants were obtained for both isomers. Comparison of the 19F NMR spectra from both the [1/2A1/2X]2 and the [1A1/2X]2 systems in 15N2F2 and 14N2F2 overcomes the inherent ambiguities of the [AX]2 analysis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260331009
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