ABSTRACT
The nuclear magnetic resonance (NMR) spectroscopic analyses are occurring everywhere in homogeneous catalysis. NMR spectroscopy can provide valuable information on their composition and structure within a reasonably tight time frame. The vast majority of NMR machines working today in the laboratories are pulsed spectrometers, making use of pulsed Fourier transform NMR spectroscopy. Traditionally, NMR spectroscopy of paramagnetic molecules has been relatively underestimated by researchers. This chapter presents the H, C heteronuclear correlated spectrum of the sample compound. The principles of heteronuclear H, X-correlation spectroscopy (X-COSY) are similar to those of homonuclear COSY. The COSY spectrum reflects only the correlations between protons of neighboring CH2 groups. The total correlation spectroscopy (TOCSY) and COSY spectra can provide complementary information: the former gives the general picture of scalar interactions existing within the same molecule, while the latter provides the "order" of these interactions and thus helps to establish the chemical structure.
