1,1′-(Ethane-1,2-di­yl)dipyridinium dichromate(VI)

In the cation of the title salt, (C12H14N2)[Cr2O7], the two pyridinium moieties are in an anti orientation with respect to one another. The dihedral angle between the pyridine rings is 6.3 (2)°. The N—C—C—N torsion angle is 177.5 (2)°. In the dianion, the CrVI ions are in a slightly distorted tetra­hedral coordination environment and the bond angles at the independent CrVI ions are in the ranges 105.93 (10)–110.60 (11) and 107.35 (11)–111.07 (12)°. The Cr—O—Cr angle is 127.96 (12)°. The crystal used was an inversion twin with refined components of 0.510 (19) and 0.490 (19)

1,1′-(Ethane-1,2-di­yl)dipyridinium bis­(iodate)

The title salt, C12H14N2 2+·2IO3 −, exhibits two crystallographically independent iodate anions, the I atoms of which are each in a trigonal–pyramidal environment. In the dication, the two pyridine rings adopt an anti conformation with respect to each other; the angle between these two rings is 3.84 (19)°. In the crystal structure, C—H⋯O hydrogen bonds between the cations and anions lead to the formation of layers arranged parallel to the ab plane. I⋯O halogen bonds [R 2 2(4) graph-set motif] range between 2.873 (2) and 3.036 (3) Å and connect neighbouring IO3 − anions with each other along [100], so as to create a three-dimensional network