Abstract
The title compound, (C
3
H
12
N
2
)[Cr
2
O
7
], consists of a discrete dichromate anion with an eclipsed conformation and a propane-1,3-diammonium cation. Both kinds of ions have a mirror plane passing through the bridging O atom and the central methylene C atom of the Cr
2
O
7
2−
and C
3
H
12
N
2
2+
moieties, respectively. Anions and cations are alternately stacked to form columns parallel to the
b
axis. Ions are linked by intra- and inter-column hydrogen bonds of types N—H⋯O and C—H⋯O, involving O atoms of the dichromate anions as acceptors, and ammonium or methylene groups as donors.