Since NMR was first demonstrated in condensed matter in 1945, the technique has experienced tremendous growth. NMR was commercialized in the 1960’s and by the end that decade NMR was routinelyused as a central tool by synthetic organic chemists. Compared to other spectroscopies NMR spectra are Figure 1.1: 1H-decoupled 13C NMR spectrum of Cholesterol. There are 26 resonances in this spectrum,which when numbered from left to right, are assigned to the corresponding numbered carbon atom inCholesterol based on its resonance frequency.
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