(Z)-3-Chloro-N-[(Z)-3-(3-chloro-2-methyl­phenyl­imino)­butan-2-yl­idene]-2-methyl­aniline

In the title compound, C₁₈H₁₈Cl₂N₂, the complete molecule is generated by the application of C₂ symmetry. The C=N bond has an E configuration. The dihedral angle between the benzene ring and the 1,4-diaza­butadiene plane is 66.81 (9)°.

(Z)-N-[(Z)-3-(2,4-Dimethyl­phenyl­imino)­butan-2-yl­idene]-2,4-dimethyl­aniline

The asymmetric unit of the title compound, C₂₀H₂₄N₂, contains one half -mol­ecule which exhibits a crystallographically imposed center of symmetry. The benzene rings are inclined to the 1,4-diaza­butadiene mean plane by 78.3 (2)°.

(E)-N-{(E)-2-[(3,5-Dimethylbiphenyl-4-yl)imino]­acenaphthen-1-yl­idene}-2,6-di­methyl-4-phenyl­aniline

The title compound, C₄₀H₃₂N₂, has crystallographic twofold rotation symmetry, with two C atoms lying on the axis. The dihedral angle between the two benzene rings of the 4-phenyl-2,6-dimethyl­phenyl group is 35.74 (17)°. The acenaphthene ring makes an angle of 76.93 (11)° with the benzene ring bonded to the N atom and an angle of 41.53 (13)° with the other benzene ring.