Abstract

This chapter first covers basic nuclear magnetic resonance (NMR) theory, including Fourier transform NMR. It then discusses practical aspects of sample preparation and acquisition of standard one-dimensional (1D) 1H and 13C spectra and methods of quickly distinguishing between known and previously unknown natural products. Next, it covers NMR pulse sequences, including 1D 13C spectral editing sequences, two-dimensional (2D) homonuclear and heteronuclear (e.g., 1H–13C) sequences, and selective 1D equivalents of 2D sequences. Finally, it illustrates how combinations of spectra obtained with these different sequences can be used to determine structures of unknown natural products, along with practical suggestions on how to avoid errors in structure elucidation.

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