Investigation of some intramolecular hydrogen bonds by nitrogen magnetic resonance methods

It was shown that nitrogen NMR is a powerful tool in the studies of different types of hydrogen bridges (NHN)(+), (NHN)(-), (NHN), and (NHO). Some of the NMR parameters, originally proposed by us, provide information about the charge redistribution and the extent of proton transfer. The character of hydrogen bonds depend upon solvent, temperature and the physical phase. The results of studies in the solid state using the N-15 NMR CP MAS method were also discussed.