Bis(4-nitrophenyl) selenide

In the title compound, C12H8N2O4Se, the Se atom is situated on a twofold rotational axis, so the asymmetric unit contains one half-molecule. In the molecule, the C—Se—C angle is 99.48 (13)°, the two benzene rings are inclined to each other at an angle of 63.8 (1)° and the nitro group is twisted by 15.9 (1)° from the attached benzene ring. In the crystal, molecules are held together through weak C—H⋯O interactions, forming a three-dimensional network.

In the title compound, C 12 H 8 N 2 O 4 Se, the Se atom is situated on a twofold rotational axis, so the asymmetric unit contains one half-molecule. In the molecule, the C-Se-C angle is 99.48 (13) , the two benzene rings are inclined to each other at an angle of 63.8 (1) and the nitro group is twisted by 15.9 (1) from the attached benzene ring. In the crystal, molecules are held together through weak C-HÁ Á ÁO interactions, forming a three-dimensional network.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CV5389).
Herewith we report the crystal structure of the title compound, (I).
In (I) (Fig. 1), each Se atom is situated on a twofold rotational axis, so asymmetric part contains a half of the molecule.
The crystal packing is stabilized by the weak C-H···O hydrogen bonds (Table 1).
Subsequently, the resulting mixture was diluted with ethyl acetate and water, and the combined organic extracts were dried with sodium sulfate anhydrous. After the solvent being removed under reduced pressure, the residue was purified by silica-gel column chromatography to afford the corresponding product. Yellow single crystals suitable for X-ray diffraction were obtained by recrystallization from acetone.

Refinement
H atoms were placed in calculated positions, with C-H = 0.95 Å, and refined using a riding model, with U iso (H) = 1.2U eq (C).