title: Crystal structure of 2,3,5,6-tetra-kis[(methyl-sulfan-yl)meth-yl]pyrazine.
abstract: 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).
authors.affiliation: CanAm Bioresearch Inc., 9-1250 Waverley Street, Winnipeg, Manitoba, R3T 6C6, Canada.
authors.forename: Tokouré
authors.initials: T
authors.lastname: Assoumatine
authors.affiliation: Institute of Physics, University of Neuchâtel, rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland.
authors.forename: Helen
authors.initials: H
authors.lastname: Stoeckli-Evans
keywords: crystal structure; inversion symmetry; pyrazine; sulfanyl-methyl derivative; tetrakis-substituted