In this paper, the possibility of obtaining information on the structure and dynamics of hydrogen bonds by studying heteronuclear dipolar interactions with mobile hydrons, i.e. protons and especially deuterons, is explored. The study of dipolar interactions with deuterons has several advantages. Firstly, high resolution is easily achieved because broad-band H-1 decoupling can be applied without removing the dipolar interaction to the deuterated site of interest. Secondly, deuteration of mobile proton sites can easily be achieved; the selectivity is enhanced by additional C-13 or N-15 labeling. Thirdly, it becomes possible to measure hydrogen deuterium isotope effects on hydrogen bond distances if the corresponding dipolar coupling to H-1 can also be determined. In this paper, the N-15-H-2 (ND) interaction in static samples of N-15-enriched organic polycrystalline powders is studied by N-15 CP NMR line-shape analysis (CP : cross polarization) after establishing the parameters of the chemical shift anisotropy from experiments performed on the protonated species. This method is particularly suitable for variable temperature studies as required in the case of hydrogen-bonded systems with mobile deuterons. As examples, three compounds typical for various situations were studied : The trimethylammonium chloride (CD3)(3)N-15-H-Cl (1a) and (CH3)(3)N-15-D-Cl (1b) were chosen as examples of N-L-X hydrogen-bonded systems (L = H, D), exhibiting an H/D isotope effect on the NL distance. Dimethyldibenzotetraaza[14]annulene-N-15(4) (2) represents the case of N-L-N hydrogen bonds with mobile deuterons. Finally, alpha-glycine, (-)OOCCH(2)(15)NL(3)(+) (3) was studied as an example where more than one hydrogen isotope is bound to N-15 and where rotational jumps occur around the C-N-15 axis. Depending on the number of deuterons, multiplets of differing orders could be observed in the N-15 CP NMR spectra. These multiplets contain information concerning the localization and the mobility of the ammonium deuterons. The results obtained agree well with those obtained by other methods.