ABSTRACT
Nuclear magnetic resonance (NMR) has become the most widely applied spectroscopic method in all aspects of chemistry. This chapter explores the application of NMR in the structure determination of naturally occurring pesticides. There are many works on the subject of NMR where detailed information can be obtained. NMR has its origin in the fact that certain atomic nuclei have magnetic properties. NMR is based on inducing transitions between such energy levels. Interpretation of NMR spectra is based on the correlation of structure with observed chemical shifts. NMR spectrometers are equipped with decouplers that enable the spectroscopist to irradiate a particular resonance frequency with a second radio frequency. 13C NMR spectroscopy has developed to the point where it is at least as useful as 1H NMR in structure determination of natural products having pesticidal properties. Proton and C NMR spectroscopy is a valuable tool for the elucidation of structures of the gibberellins.
