Abstract
The structure of the title compound, [NH3(CH2)2NH3]2[Cr2O7](C2O4), consists of inorganic columns of dichromate anions running along the c axis and organic layers of formula {[(C2H10N2)2·C2O4]n}2n+ parallel to the (100) plane. The dichromate anion lies on a crystallographic twofold rotation axis and the oxalate anion on a centre of symmetry. Three of the four crystallographically independent O atoms of the dichromate anion are disordered, two over two sites and one over three sites; the site occupancy factors are approximately 0.65:0.35, 0.7:0.3 and 0.4:0.3:0.3. Structural cohesion is ensured by N—H⋯O hydrogen-bonding interactions, which form a three-dimensional framework.
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