In the structure of the title compound, [CuCl2(C2H3N)-(C6H8N2)], each Cu2cation is surrounded by two 2,5-dimethylpyrazine ligands, one acetonitrile
ligand and two Cl- anions within a distorted tetragonal pyramid. The aceton
itrile ligand, which forms the apex of the pyramid, the Cu2+ cation and the
Cl- anions are all located in general positions, whereas each of the 2,5-d
imethylpyrazine ligands is located about a centre of inversion. The 2,5-dim
ethylpyrazine ligands connect the Cu2+ cations via mu -N:N' coordination to
form chains.