1-Ethoxy-2-methoxy-4-[2-(4-nitrophenyl)ethenyl]benzene

In the title molecule, C17H17NO4, the dihedral angle between the two aromatic rings is 42.47 (7)°. The nitro group is twisted by 7.44 (11)° out of the plane of the ring to which it is attached. The methoxy and ethoxy group O atoms deviate significantly from the phenyl ring [by 0.0108 (11) and 0.0449 (11) Å, respectively]. The crystal structure is stabilized by C—H⋯π interactions.

In the title molecule, C 17 H 17 NO 4 , the dihedral angle between the two aromatic rings is 42.47 (7) . The nitro group is twisted by 7.44 (11) out of the plane of the ring to which it is attached. The methoxy and ethoxy group O atoms deviate significantly from the phenyl ring [by 0.0108 (11) and 0.0449 (11) Å , respectively]. The crystal structure is stabilized by C-HÁ Á Á interactions.

Related literature
For the synthesis of the title compound, see: Tam et al. (1989). For hybridization, see: Beddoes et al. (1986) Experimental Crystal data
Cg2 is the centroid of the C9-C14 benzene ring.
Data collection: APEX2 (Bruker, 2008); cell refinement: SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009). TS and DV thank the TBI X-ray facility, CAS in Crystallography and Biophysics, University of Madras, India, for data collection and TS thanks DST for the Inspire fellowship. PMD and SK thank SERC-DST for providing financial support and VIT University management for their constant encouragement.
Experimental 4-Ethoxy 3-Methoxy 4-Nitrostilbene (4E3MONS) is a derivative material of stilebene.The material (4E3MONS) was synthesized by Witting reaction method. The material was prepared from the 4-ethoxy 3-methoxy benzaldehyde and diethyl p-nitrobenzyl phosphonate in the presence of sodium ethoxide catalyst. The steps involved during the chemical reactions are as follows: the calculated amount of diethyl p-nitrobenzyl phosphonate (0.01 mol %, 2.2304ml) and 4-ethoxy 3-methoxy benzaldehyde (0.01 mol, 1.802 ml %) were added in the ethanol solution (35 ml). After the reaction process, the sodium ethoxide,which plays a role of catalyst, was added immediately the colour of the solution became red. Then the mixture was stirred for 12 hrs at ice cold temperature in ultracryostat which has stirrer rotation facility.
After the stirring process completed, the orange colour 4E3MONS material was collected from the mixture by removing the ethanol (Tam et al., 1989). Then the 4E3MONS was purified by a successive recrystallization process.

Refinement
Hydrogen atoms were placed in calculated positions with C-H = 0.93 Å and refined in riding model with fixed isotropic displacement parameter: U iso (H) = 1.2 U eq (C).

Figure 2
A view of the C-H···N and C-H···O hydrogen bonds (dotted lines) in the crystal structure of the title compound.
[Symmetry codes: (i) -x + 1, -y -1, -z; (ii) -x +1/2, y -1/2, -z + 1/2.]  (6) Special details Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes. Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > 2sigma(F 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 )
x y z U iso */U eq O4