Crystal structure of 2,2′-bipyridine-1,1′-diium tetrachloridozincate

In the crystal structure of the title salt, (C 10 H 10 N 2 )[ZnCl 4 ], the bipyridinediium dication is not planar, with a dihedral angle of 37.21 (9)° between the planes of the two pyridine rings. In the crystal, the slightly distorted [ZnCl 4 ] 2− anions are packed into rods parallel to [001], with the organic cations arranged in corrugated layers parallel to (100). Cations and anions are linked through N—H...Cl hydrogen bonds, forming chains parallel to [20-1]. Additional C—H...Cl interactions consolidate the crystal packing.