The title compound, C34H40N2O2, exists in an extended conformation and has crystallographically imposed centrosymmetry. The crystal packing can be described as being composed of parallel layers stacked along [010]. The zwitterionic structure is stabilized by an intra-molecular N-H⋯O hydrogen-bond inter-action.
Keywords: 1,12-diaminododecane; 2-hydroxy-1-naphthaldehyde; crystal structure; hydrogen bonds.