Redetermination of 4-(dimethyl-amino)-pyridinium tribromide

In the title salt, C(7)H(11)N(2) (+)·Br(3) (-), 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-mol-ecule 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 ortho-rhom-bic unit cell.