Synthesis and crystal structure of catena-poly[[dibromidozinc(II)]-μ-2,3-dimethylpyrazine-κ² N ¹:N ⁴]

The title compound, [ZnBr 2 (C 6 H 8 N 2 ) 2 ] n , was prepared by the reaction of zinc bromide with 2,3-dimethylpyrazine in acetonitrile and is isotypic to the corresponding compound with zinc chloride reported recently [Näther & Bhosekar (2025). Acta Cryst. E 4 , 813–820]. The asymmetric unit consists of one zinc cation, two crystallographically independent bromide anions and one 2,3-dimethylpyrazine ligand, all of which are located in general positions. In the crystal, the Zn cations are tetrahedrally coordinated by two bromide anions and two 2,3-dimethylpyrazine ligands and are linked by bridging 2,3-dimethylpyrazine ligands into corrugated chains that proceed along the c -axis direction. Measurements using powder X-ray diffraction show that a pure crystalline phase was obtained.