rac-2,2′-Bipiperidine-1,1′-diium dibromide

Abstract

In the title compound, C10H22N22+·2Br−, a precursor in the synthesis of organocatalysts, the bipiperidinium ion is located on a twofold rotation axis which passes through the mid-point of the central C—C bond. The piperidinium ring adopts a chair conformation. In the crystal, the cations are linked together by Br− ions through N—H...Br hydrogen bonds, forming layers parallel to the ab plane.