Abstract
The title compound, (C2H8N)4[Cu(C6H2N10)2Cl2], consists of an anionic complex which is composed of a CuII 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 CuII 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 CuII 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.
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