A monoclinic polymorph of 1,2-bis-[(1-methyl-1H-tetra-zol-5-yl)sulfan-yl]ethane (BMTTE).

The synthesis and crystal structure of a monoclinic (P21/c) polymorph of the title compound, C6H10S2N8, are reported. The mol-ecule has pseudo-twofold rotational symmetry, with the tetra-zole rings being inclined to one another by 5.50 (6)°. In the crystal, mol-ecules are linked by C-H⋯N hydrogen bonds, forming chains propagating along [101] and enclosing R22(20) ring motifs. The chains are linked by offset π-π inter-actions involving the tetra-zole rings [inter-centroid distances vary from 3.3567 (7) to 3.4227 (7) Å], forming layers parallel to the ac plane. The crystal structure of the triclinic polymorph (P [Formula: see text]) has been described previously [Li et al. (2011 ▸). Acta Cryst. E67, o1669].