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

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 Br⋯Br and/or ar­yl–aryl inter­actions within each stack. The anion–anion stacks inter­act via Br⋯Br inter­actions [Br⋯Br = 3.6368 (16) A] to form one-dimensional arrays. The Br⋯aryl inter­actions are arranged in a ⋯ar­yl⋯Br⋯ar­yl⋯Br⋯ infinite motif [Br⋯centroid distance 4.07 (1) A], linking the anions and cations into two-dimensional layers.