(E)-4-Allyl-2-[(2-hydroxy-phen-yl)iminiometh-yl]-6-methoxy-phenolate

Abstract

The title compound, C17H17NO3, crystallizes in a zwitterionic form with cationic iminium and anionic enolate groups. The zwitterion exists in a trans configuration about the C=N bond. The dihedral angle between the two benzene rings is 13.42 (7)°. The meth-oxy group is almost coplanar [C - O - C - C = 2.1 (2)°] with the attached ring whereas the allyl unit is oriented at a dihedral angle of 67.9 (1)°. An intra-molecular N - H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, the mol-ecules are linked into zigzag chains along [010] by O - H⋯O hydrogen bonds. In addition, weak C - H⋯π inter-actions are observed.