How applicable are geometrical criteria for analysis of the intramolecular N···C=O interaction in the peri-substituted naphthalene system?

Topological analysis of the electron density and potential energy density distribution functions in the crystal of 8-dimethylamino-N’,N’-dimethylnaphthalene-1-carboxamide in conjunction with geometrical criteria proposed by J. D. Wallis et al. (J. Chem. Soc., Perkin Trans. 2, 2001, 133), revealed unambiguously that the intramolecular Me₂N···C=O contact (2.71 Å) corresponds to attractive interaction.