Acta Cryst. (2009). E65, m73-m74  [ doi:10.1107/S1600536808041652 ]

Bis(2-amino-4-methylpyridinium) tetrachloridocuprate(II)

R. H. Al-Far and B. F. Ali

Abstract: The asymmetric unit of the title compound, (C₆H₉N₂)₂[CuCl₄], consists of one cation and one half-anion, bisected by a twofold rotation axis through the metal center. The anion exhibits a geometry that is intermediate between a T_d and D_4h arrangement about the Cu atom. The crystal structure contains chains of cations alternating with stacks of anions. The cationic groups interact via offset face-to-face - stacking, forming chains running along the c axis. The anion stacks are parallel to the cation chains, with no significant inter- nor intrastack ClCl interactions. There are several anion-cation hydrogen-bonding interactions of the (N-H)_pyridineCl and (N-H)_aminoCl types, connecting the chains of cations to the stacks of anions. Both the N-HCl and - stacking interactions [centroid-centroid distances 3.61 (8) and 3.92 (2) Å] contribute to the formation of a three-dimensional supramolecular architecture.

Online 17 December 2008

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