3,3′-(Ethane-1,2-diyl)bis(2-thioxo-1,3-oxazolidin-4-one)

The asymmetric unit of the title compound, C8H8N2O4S2, contains one half of a centrosymmetric molecule. A short C⋯O distance of 3.012 (4) Å between the carbonyl groups of neighbouring molecules indicates the presence of dipole–dipole interactions. The crystal packing exhibits also weak intermolecular O⋯S [3.239 (3) Å] and C—H⋯O interactions.

The asymmetric unit of the title compound, C 8 H 8 N 2 O 4 S 2 , contains one half of a centrosymmetric molecule. A short CÁ Á ÁO distance of 3.012 (4) Å between the carbonyl groups of neighbouring molecules indicates the presence of dipoledipole interactions. The crystal packing exhibits also weak intermolecular OÁ Á ÁS [3.239 (3) Å ] and C-HÁ Á ÁO interactions.

Comment
The research on N-substitution 2-thioxooxazolidin-4-one compounds have been mushroomed for their interesting biological and spectral properties (Cutshall et al., 2005;Gupta et al., 1981).

Experimental
The title compound was prepared according to the method of Doğan et al. (1992). Colourless block-shape crystal of (I) suitable for X-ray diffraction was obtained from ethanol/water (V: V = 4: 1).

Refinement
H atoms were found in difference map, placed in idealized positions (C-H 0.97 Å) and refined as riding, with U iso (H) = 1.2 U eq (C). Fig. 1. The molecular structure of (I), with displacement ellipsoids drawn at the 30% probability level and atomix numbering [symmetry code:

Figures
3,3'-(Ethane-1,2-diyl)bis(2-thioxo-1,3-oxazolidin-4-one) 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