Crystal structure of 5-di-ethyl-amino-2-({[4-(di-ethyl-amino)-phen-yl]imino}-meth-yl)phenol.

In the title compound, C21H29N3O, the dihedral angle between the planes of the aromatic rings is 8.1 (2)°. The ethyl groups at one terminal site of the compound are disordered over two sets of sites with occupancies of 0.775 (9) and 0.225 (9). The mol-ecule has an E conformation about the N=C bond. The mol-ecular structure features an intra-molecular O-H⋯N hydrogen bond, which closes an S(6) loop. In the crystal, weak C-H⋯π inter-actions leads to the formation of a three-dimensional network.

Crystal structure of (E)-5-di-ethyl-amino-2-({[4-(di-methyl-amino)-phen-yl]imino}-meth-yl)phenol.

The title Schiff base compound, C19H25N3O, is approximately planar, with a dihedral angle of 9.03 (13)° between the planes of the aromatic rings, and has an E conformation about the N=C bond. The mol-ecular structure is stabilized by an intra-molecular O-H⋯N hydrogen bond, with an S(6) ring motif. In the crystal, mol-ecules are linked by C-H⋯π inter-actions, forming sheets parallel to the bc plane.