Abstract
The title salt, (C19H18NO2)(2)[Cu2Br6], was obtained from an attempt to synthesize the copper(II) complex of 2,6-bis(2-methoxyphenyl) pyridine (L) from a reaction between CuBr2 and one equivalent of L in CH2Cl2 at room temperature. The resulting compound is the salt of the 2,6-bis(2-methoxyphenyl) pyridinium cation and 0.5 equivalents of a hexabromidodicuprate(II) dianion. Both methoxy groups of the cationic pyridinium moiety are directed towards the N atom of the pyridine ring as a result of intramolecular N-H center dot center dot center dot O hydrogen bonds. The centrosymmetric hexabromidodicuprate dianion possesses a distorted tetrahedral geometry at the copper ion. The Cu-Br bond lengths are 2.3385 (7) and 2.3304 (7) angstrom for the terminal bromides, whereas the bond length between the Cu atom and two bridging bromides is slightly longer [2.4451 (6) angstrom].
