(E)-2-{[4-(dimethylamino)benzylidene]amino}-5-nitrophenol

Abstract

The title Schiff base compound, C15H15N 3O3, crystallizes with two molecules (A and B) in the asymmetric unit. Each molecule adopts an E conformation around the C= N imine bond. The two molecules have minor differences in their conformations. In molecule A, the dihedral angle between the nitro group and its benzene ring is 2.1(2)° and that between the two benzene rings is 0.88(7)°, while the corresponding angles for molecule B are 5.7(1) and 2.45(6)°, respectively. In each molecule, there is an intramolecular O - H⋯N hydrogen bond. In the crystal, inversion-related molecules are linked via O - H⋯O hydrogen bonds forming A-A and B-B dimers. These dimers are linked via C - H⋯O hydrogen bonds involving the nitro O atoms, forming A-A-A and B-B-B slabs that lie parallel to one another and to (010). © 2014 CrossMark.