Bis(2,4,6-trimethyl-pyridinium) tetra-bromidozincate

Acta Crystallogr Sect E Struct Rep Online. 2012 Nov 1;68(Pt 11):m1320. doi: 10.1107/S1600536812040925. Epub 2012 Oct 3.

Abstract

In the title compound, (C(8)H(12)N)(2)[ZnBr(4)], the coordination geometry of the anion is approximately tetra-hedral. The Zn-Br bond lengths range from 2.3901 (19) to 2.449 (2) Å and the Br-Zn-Br angles range from 107.09 (8) to 112.48 (8)°. In the crystal, each [ZnBr(4)](2-) anion is connected to four cations through two N-H⋯Br and two C-H⋯Br hydrogen bonds, forming two-dimensional ⋯(cation)(2)⋯anion⋯(cation(2))⋯ sheets parallel to the bc plane. Within each sheet, the anions are arranged in stacks with no significant inter-anion Br⋯Br inter-actions [the shortest being > 4.3 Å], while the cations are in chains, with weak π-π stacking inter-actions [centroid-centroid distance = 3.991 Å] between cations inter-acting with the same anion.