Crystal structure of 5-di­ethyl­amino-2-({[4-(di­ethyl­amino)­phen­yl]imino}­meth­yl)phenol

In the title compound, C(21)H(29)N(3)O, 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 mol­ecule has an E conformation about the N=C bond. The mol­ecular structure features an intra­molecular O—H⋯N hydrogen bond, which closes an S(6) loop. In the crystal, weak C—H⋯π inter­actions leads to the formation of a three-dimensional network.