Acta Cryst. (2008). E64, m689-m690  [ doi:10.1107/S1600536808010647 ]

Bis(2-amino-6-methylpyridinium) tetrabromidocuprate(II)

R. H. Al-Far, B. F. Ali and S. F. Haddad

Abstract: In the crystal structure of the title compound, (C₆H₉N₂)₂[CuBr₄], the geometry around the Cu atom is intermediate between tetrahedral (T_d) and square planar (D_4h). Each [CuBr₄]^2- anion is connected non-symmetrically to four surrounding cations through N-HX (pyridine and amine proton) hydrogen bonds, forming chains of the ladder-type running parallel to the crystallographic b axis. These layers are further connected by means of offset face-to-face interactions (parallel to the a axis), giving a three-dimensional network. Cation - stacking [centroid separations of 3.69 (9) and 3.71 (1) Å] and Braryl interactions [3.72 (2) and 4.04 (6) Å] are present in the crystal structure. There are no intermolecular BrBr interactions.

Online 23 April 2008

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