ABSTRACT
Firstly, the chapter defines the principal grandeurs which characterize high-resolution spectra. Some diagrams themselves, directly given by the apparatuses, are studied. A very simple example of ethylbenzene is chosen. Some structural characteristics of samples submitted to an RMN analysis which have, hence, a great influence on the form of their spectra are then studied. They are the chemical shifts of the different elements or groups of elements present in the molecules and the different spin-spin couplings. They are the major determinants of the checked structures by NMR. Their origin is discussed. Although 13H spectra are the most studied in this chapter, some characteristics of the 13C NMR and 19F NMR are also given. Finally, quantitative analysis by NMR is investigated. It is, of course, above all interesting in organic chemistry. Despite its great interest, the method lacks sensitivity in this domain.
