T. Okuno et al., COEXISTENCE OF INTERMOLECULAR FERROMAGNETIC INTERACTION AND [NHN](-BOND IN N-PROTONATED M-PYRIDYL NITRONYL NITROXIDE() HYDROGEN), Journal of the Chemical Society, Chemical Communications, (8), 1995, pp. 827-828
Reaction of 4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl 3-N-oxi
de (m-PYNN) and HBr gas gives rise to the complex (m-PYNN)(2)HBr, in w
hich the coexistence of an intermolecular ferromagnetic interaction an
d an [NHN]+ hydrogen bond is found.