Synthesis and crystal structure of catena-poly[[di-bromido-zinc(II)]-μ-2,3-di-methyl-pyrazine-κ2 N 1:N 4].

The title compound, [ZnBr2(C6H8N2)2] n , was prepared by the reaction of zinc bromide with 2,3-di-methyl-pyrazine in aceto-nitrile and is isotypic to the corresponding compound with zinc chloride reported recently [Näther & Bhosekar (2025 ▸). Acta Cryst. E4, 813-820]. The asymmetric unit consists of one zinc cation, two crystallographically independent bromide anions and one 2,3-di-methyl-pyrazine ligand, all of which are located in general positions. In the crystal, the Zn cations are tetra-hedrally coordinated by two bromide anions and two 2,3-di-methyl-pyrazine ligands and are linked by bridging 2,3-di-methyl-pyrazine 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.