Nuclear spin relaxation in dimethylformamide-d7 solution of
1,8-bis(dimethylamino)naphthalene (DMAN) was investigated. Detailed analysis
of 13C longitudinal relaxation in this molecule yielded its rotational
diffusion tensor. Comparison to protonated form of DMAN, DMANH+, leads to
conclusions concerning interaction of the latter with its counterion.