1-[(2-Anilinoeth­yl)iminiometh­yl]-2-naph­thol­ate

The title Schiff base compound, C(19)H(18)N(2)O, was prepared by the reaction of equimolar quanti­ties of 2-hydr­oxy-1-naphthaldehyde with N-phenyl­ethane-1,2-diamine in a methanol solution. The mol­ecule adopts a zwitterionic conformation with the naphthyl OH group deprotonated and the imine N atom protonated. An intra­molecular N—H⋯O hydrogen bond forms between them. The dihedral angle between the benzene ring and the naphthyl system is 86.9 (2)°. In the crystal structure, mol­ecules are linked through inter­molecular N—H⋯O hydrogen bonds, forming chains running along the b axis.