Redetermination of 4-(dimethylamino)pyridinium tribromide

Abstract

In the title salt, C7H11N2+·Br3−, the essentially planar cation (r.m.s. deviation = 0.006 Å) forms an N—H...Br hydrogen bond to one of the Br atoms of the almost linear anion [Br—Br—Br = 179.31 (2)°]. The crystal studied was found to be a racemic twin. The whole-molecule disorder of the cation and anion about a twofold rotation axis described earlier [Ng (2009). Acta Cryst. E65, o1276] is an artifact of halving one of the axes of the orthorhombic unit cell.