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  • 1
    Electronic Resource
    Electronic Resource
    Total assignment of the 1H- and 13C-NMR spectra of dinaphtho[1,2-b:1′,2′-d]thiophene through the concerted use of two-dimensional NMR techniques (1988)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 26 (1988), S. 839-847 
    Details
    ISSN: 0749-1581
    Keywords: 2D NMR ; heteronuclear chemical shift correlation ; COSY ; double quantum coherence ; zero quantum coherence ; relayed coherence transfer ; J-filtration ; long range heteronuclear shift correlation ; BIRD pulse ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 1H- and 13C-NMR spectra of dinaphtho[1,2-b:1′2′-d]thiophene (1), a sulfur-containing polynuclear heteroaromatic, have been totally assigned using a combination of two-dimensional NMR techniques. Techniques applied were standard proton-proton COSY, proton zero-quantum coherence (ZQCOSY, optimized to 7 Hz and to 1.75 Hz), proton double quantum coherence (DQCOSY, optimized to 7 Hz), broad-band decoupled (both dimensions) proton-carbon chemical shift correlation, long-range proton-carbon chemical shift correlation, and proton-carbon heteronuclear relayed coherence transfer. A comparison of these methods on 1 showed the most useful information concerning connectivities to be obtained from the zero-quantum coherence and long-range heteronuclear correlation experiments. A detailed critique of each type of experiment is given in the context of applications to polynuclear aromatics.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260261007
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Total assignment of the 1H and 13C NMR spectra of phenanthro[9,10-b]thiophene: Concerted use of two-dimensional NMR techniques (1989)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 27 (1989), S. 318-322 
    Details
    ISSN: 0749-1581
    Keywords: 2D NMR ; Heteronuclear chemical shift correlation ; Heteronuclear relayed coherence transfer ; Proton-detected long-range heteronuclear multiple quantum coherence ; HMBC ; Low-pass J-filtration ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 1H and 13C NMR spectra of phenanthro[9,10-b]thiophene were totally assigned using a combination of twodimensional NMR techniques. Direct hetcronuclear correlations were established using heteronuclear chemical shift correlation with semi-selective proton decoupling. Two methods were employed to establish the identity of vicinal neighboring protons: heteronuclear relayed coherence transfer and low-pass J-filtered heteronuclear relayed coherence transfer. The versatilities of the two techniques were compared. Quaternary carbon resonance assignments and the orientations of individual spin systems relative to one another were accomplished using the proton-detected long-range heteronuclear multiple quantum coherence experiment (HMBC). Key long-range inter-ring proton homonuclear spin couplings served to confirm the orientations of the proton spin systems.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260270404
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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