(Z)-3-Meth­oxy-N-[(5-nitro­thio­phen-2-yl)methyl­idene]aniline

In the title compound, C₁₂H₁₀N₂O₃S, the dihedral angle between the benzene and thio­phene rings is 43.17 (4)°. The crystal structure is devoid of any hydrogen-bonding inter­actions. However, π–π inter­actions between the benzene and thio­phene rings [distance between ring centroids = 3.6850 (11) Å] stack the mol­ecules along the a axis. The absolute structure could not be determined as the crystal studied was a racemic twin with a BASF parameter of 0.31 (6).

(E)-1-[(3-Bromo­phen­yl)imino­meth­yl]naphthalen-2-ol

The title compound, C₁₇H₁₂BrNO, exists in an enol–imine form and the mol­ecular structure features an intra­molecular O—H...N hydrogen bond. The dihedral angle between the benzene ring and the naphthalene ring system is 17.27 (15)°.

4-Meth­oxy-N-[(E)-(5-nitro­thio­phen-2-yl)methyl­idene]aniline

The title mol­ecule, C₁₂H₁₀N₂O₃S, is nonplanar with an inter­planar angle of 33.44 (7)° between the benzene and thio­phene rings. In the crystal there exist only weak inter­molecular C—H...O inter­actions, π–π inter­actions between the benzene rings [centroid–centroid distance = 3.7465 (14) Å] and X—Y...π inter­actions to the thio­phene and benzene rings [N...centroid distances = 3.718 (3) and 3.355 (3) Å, respectively]. Inter­molecular C—H...O inter­actions link the mol­ecules into chains parallel to the a axis.

(E)-1-[(3-Iodo­phen­yl)imino­meth­yl]naphthalen-2-ol

In the title mol­ecule, C₁₇H₁₂INO, the dihedral angle between the naphthaldeyde plane and the 3-iodo­aniline plane is20.07 (13)°. It exists in the solid state as an enol–imine tautomer with a strong intra­molecular O—H...N hydrogen bond.

(E)-N-[(2-Eth­oxy­naphthalen-1-yl)methyl­idene]-2-ethyl­aniline

In the title compound, C₂₁H₂₁NO, the dihedral angle between the naphthalene ring system and the benzene ring is 64.61 (6)°. The mol­ecular structure is stabilized by an intra­molecular C—H...N hydrogen bond.