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  • 1
    Digitale Medien
    Digitale Medien
    Current Aspects of Practical Two-Dimensional (2D) Nuclear Magnetic Resonance (NMR) Spectroscopy: Applications to Structure Elucidation (1989)
    Springer
    Pharmaceutical research 6 (1989), S. 531-554 
    Details
    ISSN: 1573-904X
    Schlagwort(e): Nuclear magnetic resonance (NMR) ; two-dimensional (2D) NMR ; pulse sequence ; phase cycle ; COSY ; double-quantum filtered COSY ; CH COSY ; indirect detection ; NOESY ; relayed COSY ; TOCSY ; HOHAHA ; ROESY
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The intense effort in developing new 2D NMR methodology over the past decade has been driven by the desire to study molecules of progressively greater complexity. The need for refined structural detail has produced new types of experiments that require more involvement on the part of the practicing spectroscopist in understanding the theoretical bases leading to their experimental realization. In this Review we discuss several concepts that are important in the successful application of current versions of the most useful 2D NMR experiments, such as coherence transfer, phase cycling, apodization functions, and obtaining pure-phase 2D NMR spectra. The intimate interconnections among these concepts are emphasized. The principles underlying the 2D NMR experiments are described and then the experiments are illustrated in assigning the 1H and 13C NMR spectra of the triterpene, ursolic acid.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1015941128608
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  • 2
    Digitale Medien
    Digitale Medien
    Solution conformation of the ketone and epoxide synthetic precursors of β-chamigrene determined by 1H and 13C NMR spectroscopy and distance geometry (1993)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 31 (1993), S. 906-909 
    Details
    ISSN: 0749-1581
    Schlagwort(e): 1H NMR ; 13C NMR ; NOESY ; Conformation ; β-Chamigrene ; Distance geometry ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Utilizing 2D NMR spectroscopy (COSY, NOESY, TOCSY, inverse detected 1H/13C correlation spectroscopy), the 1H and 13C NMR spectra of the ketone and epoxide precursors of β-chamigrene were assigned. The dihedral angles and distances determined from NMR measurements provide input parameters to calculate the molecules' solution conformation by distance geometry. The factors which are important in influencing the conformation of these molecules are discussed.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/mrc.1260311006
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