Acta Cryst. (2007). E63, m2242-m2243  [ doi:10.1107/S1600536807036513 ]

Intermolecular interactions in 2,5-dimethylpyrazinium tetrabromidothallate(III)

R. Al-Far and B. F. Ali

Abstract: In the title compound, (C₆H₁₀N₂)[TlBr₄], the asymmetric unit contains one half-cation and one half-anion, where the Tl atom has a distorted tetrahedral environment. The Tl atom and two Br atoms lie on a mirror plane; the cation is centrosymmetric, with the H atom disordered over both N atoms. In the crystal structure, the cations and anions are packed into alternate stacks, with no significant intermolecular BrBr and/or aryl-aryl interactions within each stack. The anion-anion stacks interact via BrBr interactions [BrBr = 3.6368 (16) Å] to form one-dimensional arrays. The Braryl interactions are arranged in a arylBrarylBr infinite motif [Brcentroid distance 4.07 (1) Å], linking the anions and cations into two-dimensional layers.

Online 31 July 2007

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