Imidazolium trans-di­aqua­dioxalato­chromate(III) dihydrate

In the title hydrated mol­ecular salt, (C(3)H(5)N(2))[Cr(C(2)O(4))(2)(H(2)O)(2)]·2H(2)O, the complete cation is generated by a crystallographic twofold rotation axis, with one C atom lying on the rotation axis. The complete anion is generated by crystallographic inversion symmetry (Cr(III) site symmetry -1), to generate a slightly distorted CrO(6) octa­hedron with trans water mol­ecules and chelating oxalate dianions. The oxalate ion is almost planar (r.m.s. deviation = 0.017 Å) and the five-membered chelate ring is a shallow envelope with the metal ion displaced by 0.126 (1) Å from the ligand atoms. The crystal structure features O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds, which link the components into a three-dimensional network.