J. Klimkiewicz et al., APPLICATION OF N-14 AND N-15 NMR TO THE STUDY OF AN UNSYMMETRICAL DERIVATIVE OF DMAN, Journal of molecular structure, 403(1-2), 1997, pp. 163-165
N-15 NMR measurements on the title compound (1,8-bis(dimethylamino)nap
hthalene, DMAN) and its protonated derivative, show the presence of an
unsymmetrical [N-H-N](4) structure in the protonated form. This concl
usion is reached from a consideration both of the nitrogen shieldings
and of the (1)J(N-15-H-1) results observed.