Crystal Structure, and Crystal Supramolecularity of Bis(3,5- Dimethylpyridinium)Tetrahalocuprate(II) [Halide = Cl or Br]

The reaction of cux2 (x = cl or br) with 3,5-dimethylpyridine in aqueous acids (hx; x = cl or br) yields bis(3,5-dimethylpyridinium)tetrachlorocuprate and tetrabromocuprate salts, 1 and 2, respectively. the crystal structures of the two compounds belong to the monoclinic space group cs/2. in the crystal structure of both 1 and 2, the cations and anions are aggregated via classical hydrogen bonding of cationic pyridinium hydrogens and x of cux4 ^2- and non-classical (п)c-h...x intermolecular interactions into a layer supramolecular architecture parallel to c axis.