5,5′-[(1,4-Phenylenedimethylene)bis(sulfanediyl)]bis(1-methyl-1H-1,2,3,4-tetrazole)

The title molecule, C12H14N8S2, has point symmetry since it is situated on a crystallographic centre of symmetry. The 1-methyl/5-thio groups are in an antiperiplanar conformation. The dihedral angle between the benzene and tetrazole rings is 84.33 (2)°. In the crystal, C—H⋯N hydrogen bonds link molecules into ladder-like chains running along the b axis. There are also C—H⋯π interactions present in the crystal structure.

The title molecule, C 12 H 14 N 8 S 2 , has point symmetry 1 since it is situated on a crystallographic centre of symmetry. The 1methyl/5-thio groups are in an antiperiplanar conformation. The dihedral angle between the benzene and tetrazole rings is 84.33 (2) . In the crystal, C-HÁ Á ÁN hydrogen bonds link molecules into ladder-like chains running along the b axis.
There are also C-HÁ Á Á interactions present in the crystal structure.
In order to search for a new tetrazole compound with higher bioactivity, the title compound has been synthesized and its crystal structure determined.
The title molecule, C 12 H 14 N 2 S 8 , has the point symmetry 1 since it is situated on the crystallographic centre of symmetry.
1-methyl-5-thio-moieties are in the antiperiplanar conformation. The dihedral angle between the benzene and tetrazole ring is 84.39 (2) °. The molecules are situated on the crystallographic centres of symmetry and therefore their point symmetry is 1. In the crystal structure, the molecules are linked by C-H···N hydrogen bonds (Tab. 1; Fig. 2) forming a ladder-like chain composed of the graph set motifs R 2 2 (22) (Etter et al. (1990). The chains are directed along the b axis.

Experimental
The title compound was synthesized according to the method reported in the literature (Wang et al., 2005). Colourless block-shaped crystals with approx. size 0.2 × 0.1 × 0.1 mm were obtained by slow evaporation from ethanol solution of the title compound.

Refinement
All the H atoms could be discerned in the difference electron density map. However, they have been situated into the idealized positions and refined within the riding atom approximation. The used constraints: C aryl -H aryl = 0.93; C methyl -H methyl = 0.96 Å; C methylene -H methylene = 0.97 Å. U iso (H aryl / methylene )=1.2; U iso (H methyl )=1.5U eq (C methyl ). The diffraction 2 0 0 has been excluded from the refinement because most probably it had been eclipsed by the beam stop.
Figures Fig. 1. The title molecule with the displacement ellipsoids drawn at the 30% probability level.  (Etter et al., 1990). 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 > σ(F 2 ) is used only for calculating Rfactors(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.