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The title compound, C12H20N2S4, synthesized by the reaction of 2,3,5,6-tetra-kis-(bromo-meth-yl)pyrazine with sodium methane-thiol-ate, crystallizes with a half -mol-ecule in the asymmetric unit. The whole mol-ecule is generated by inversion symmetry; the inversion centre being located in the centre of the pyrazine ring. The mol-ecule has an S-shaped conformation with two (methyl-sulfan-yl)methyl substituent arms directed above the plane of the pyrazine ring and two below. The C(H3)-S-C(H2)-C(aromatic) torsion angles are 70.47 (18) and -67.65 (17)°, respectively. In the crystal, mol-ecules are linked via weak C-H⋯S hydrogen bonds, forming chains along [001] and enclosing R 2 (2)(12) ring motifs. The chains are linked by further weak C-H⋯S hydrogen bonds, forming sheets lying parallel to (101).

Crystal structure of 2,3,5,6-tetrakis[(methylsulfanyl)methyl]pyrazine