4-Nitroaniline-2,4,6-trimethoxybenzaldehyde (1/1) (original) (raw)

( E )- N -(Anthracen-9-ylmethylidene)-4-nitroaniline

Acta Crystallographica Section E Structure Reports Online, 2011

In the title molecule, C 21 H 14 N 2 O 2 , the anthracenyl system is approximately planar [maximum deviation = 0.056 (4) Å ] and is oriented at a dihedral angle of 73.6 (1) with respect to the benzene ring. An intramolecular C-HÁ Á ÁN hydrogen bond generates an S(6) ring motif. The crystal packing is stabilized by C-HÁ Á Á andinteractions [centroid-centroid distances of 3.688 (2), 3.656 (1) and 3.716 (2) Å ].

Ethyl 2-[(E)-4-(dimethylamino)benzylidenehydrazino]-5-nitrobenzoate

Acta Crystallographica Section E Structure Reports Online

The title compound, C18H20N4O4, exists in the E configuration with respect to the C=N bond of the methylidine unit. The dihedral angle between the two benzene rings is 9.01 (6)°. An intramolecular N—H...O hydrogen bond involving the benzoate unit generates an S(6) ring motif. In the crystal, the molecules are linked by weak C—H...O interactions into infinite chains along the b axis. These chains are further connected into sheets parallel to the ab plane which are stacked approximately along the c axis. A C—H...π interaction is also observed.

Synthesis and Crystal Structure of 1-Chloro-2-methyl-4-nitrobenzene

Crystals, 2012

The title compound (3) was prepared from 4-chloroaniline in good yield on successive oxidation and methylation and its crystal and molecular structure is reported. The compound crystallizes in the monoclinic space group P 2 1 /n with unit cell dimensions a = 13.5698(8), b = 3.7195 (3), c = 13.5967 (8) Å, ß = 91.703(3) °, V = 685.96 (10) Å 3. The molecule is essentially planar with a dihedral angle of 6.2(3) ° between the nitro group and the phenyl ring. The crystal structure is stabilised by π...π contacts between adjacent benzene rings together with C-H...O hydrogen bonds and close Cl...O contacts.

Crystal structure of (E)-N-[(2-methoxy- naphthalen-1-yl)methylidene]-3-nitro- aniline

In the title compound, C 18 H 14 N 2 O 3 , the dihedral angle between the naphthalene ring system and the benzene ring is 59.99 (13). A short intramolecular C—HÁ Á ÁN contact closes an S(6) ring. The nitro group is disordered over two orientations in a statistical ratio. In the crystal, weak C— HÁ Á ÁO hydrogen bonds and very weak – stacking interactions [centroid–centroid separation = 3.9168 (17) A ˚ ] are observed.