2-{(E)-[4-(Di­phenyl­amino)­phen­yl]imino­meth­yl}phenol

The asymmetric unit of the title Schiff base molecule, C₂₅H₂₀N₂O, contains two independent mol­ecules. In each mol­ecule, the C=N bond is in an E conformation. The most significant difference between the two mol­ecules is seen for the dihedral angles between the meth­oxy-substituted benzene ring and the two phenyl rings, which are 85.5 (1) and 82.3 (1)° in the first mol­ecule, and 49.0 (1) and 40.4 (1)° in the second. This conformational difference is reflected in the central C=N—C[pdbond]C torsion angle, which is 28.7 (2)° in the first mol­ecule and −29.8 (3)° in the other. In each mol­ecule, there is an intra­molecular O—H...N hydrogen bond.

Crystal structure of 5-[bis­(4-eth­oxy­phenyl)amino]­thio­phene-2-carbaldehyde

In the title compound, C₂₁H₂₁NO₃S, the planes of the two benzene rings are nearly perpendicular to one another [dihedral angle = 84.50 (10)°] and they are oriented with respect to the plane of the thio­phene ring at dihedral angles of 59.15 (9) and 66.61 (9)°. In the crystal, mol­ecules are linked by weak C—H...O hydrogen bonds, forming supra­molecular chains propagating along the b-axis direction.

Crystal structure of 4-eth­oxy-N-(4-eth­oxy­phen­yl)-N-phenyl­aniline

In the title compound, C₂₂H₂₃NO₂, the planes of the eth­oxy­benzene rings are oriented with respect to that of the phenyl ring at dihedral angles of 61.77 (8) and 84.77 (8)°, and they are twisted with respect to one another, with a dihedral angle of 80.37 (7)°. In the crystal, weak C—H...π inter­actions link the mol­ecules into supra­molecular chains propagating along [101].