Single crystals of the heterovalent Cu I , Cu II π , σ -complex Cu 7 Br 6.48 Cl 1.52 · 2 C 3 N 3 ( OC 3 H 5 ) 3 are synthesized by the ac electrochemical method from an ethanol solution containing 2,4,6-triallyloxy-1,3,5-triazine, CuCl 2 · 2 H 2 O, and CuBr 2 . The unit cell parameters of the crystals are: space group P , a = 8.271 (3) The copper and halogen atoms form unique moieties Cu 6 X 6 linked by bridging fragments [ Cu 2+ ( C 3 N 3 ( OC 3 H 5 ) 3 ) 2 ] X 2 into infinite chains. Each inorganic moiety Cu 6 X 6 is linked with four 2,4,6-triallyloxy-1,3,5-triazine molecules. The ligand molecule is coordinated to one Cu II atom through the nitrogen atom of the triazine cycle and to two Cu I atoms through the C=C bonds of two allyl groups. The Br content equal to 0.57 in the X(4) position linking the Cu I and Cu II atoms differs markedly from a value of 0.85-0.91 for the X(1), X(2), and X(3) positions linked only with the Cu(I) atoms.