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

The title compound, (C(2)H(8)N)(4)[Cu(C(6)H(2)N(10))(2)Cl(2)], 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-Cl(2)N(4) 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 d (9) 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.