Tetra­kis(dimethyl­ammonium) trans-di­chloridobis[5,5′-(pyrazine-2,3-diyl)bis(1H-tetra­zol-1-ido-κN¹)]copper(II)

The title compound, (C₂H₈N)₄[Cu(C₆H₂N₁₀)₂Cl₂], consists of an anionic complex which is composed of a Cu^II ion surrounded by four N atoms from two pyrazine-2,3-diylbis(1H-tetra­zol-1-ide) ligands, and two Cl⁻ atoms in a trans-Cl₂N₄ coordination geometry; the Cu^II atom lies on a site of symmetry 2/m. The Cu—Cl distance of 2.8719 (5) Å is long due to the Jahn–Teller distortion of the d⁹ electron configuration of Cu^II ion. The tetra­zole and pyrazine rings make an N—C—C—N torsion angle of 38.25 (17)°. The charge of the anionic complex is balanced by four dimethyl­ammonium cations, which inter­act with the anionic complexes via N—H...N and N—H...Cl hydrogen bonds.