Crystal structure of a tetra­kis-substituted pyrazine compound: 2,3,5,6-tetra­kis­(bromo­meth­yl)pyrazine

The title molecule crystallizes with two half-molecules in the asymmetric unit, the whole molecules being generated by twofold rotation symmetry. In the crystal, there are two interpenetrating three-dimensional networks involving the individual molecules that are linked by C—H...Br and Br...Br interactions.

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

The title compound, C₁₂H₂₀N₂S₄, synthesized by the reaction of 2,3,5,6-tetra­kis­(bromo­meth­yl)pyrazine with sodium methane­thiol­ate, crystallizes with a half -mol­ecule in the asymmetric unit. The whole mol­ecule is generated by inversion symmetry; the inversion centre being located in the centre of the pyrazine ring. The mol­ecule has an S-shaped conformation with two (methyl­sulfan­yl)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, mol­ecules are linked via weak C—H...S hydrogen bonds, forming chains along [001] and enclosing R₂²(12) ring motifs. The chains are linked by further weak C—H...S hydrogen bonds, forming sheets lying parallel to (101).