ABSTRACT
Nuclear Magnetic Resonance (NMR) has become a widely used method for characterizing hydrocarbon samples. Extensive collections of reference spectra have led to the realization that the understanding of the chemical functionality of complex samples is incomplete due to spectral overlap and resolution problems. In recent years several new techniques have been developed to address some of these problems. This chapter discusses the application of these techniques to complex samples and describes the nature of the experiments. Most modern NMR spectrometers are equipped to use these techniques routinely. The chapter looks at examples of their applications and the type of information that can be obtained. Polarization Transfer techniques have led to spectral editing experiments which can decompose a complex spectrum into sub-spectra for each of the CHn species present.
