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The title compound, (C6H14N2)[Cr2O7], consists of a diazabicyclo[2.2.2]octane-1,4-diium cation and a discrete dichromate anion, which are linked in the crystal by N-H…O hydrogen bonds. The cation is ordered and distorted, owing to the confinement and twist of the hydrogen bonds involved. Two CrO4 tetrahedra are joined through a shared O atom to form the dichromate anion. Chiral supramolecular chains of the title compound are built up via N-H…O hydrogen bonds, and C-H…O interactions play subordinate roles in forming the structure. [ABSTRACT FROM AUTHOR]

In the title adduct, C6H12N2·C7H8O2, the orcin and 1,4diazabicyclo[2.2.2]octane moieties are held together by OH···N hydrogen bonds. One-dimensional chiral hydrogenbonded chains are formed along the b axis. Neighbouring chains are held together principally by van der Waals interactions and are interrelated by translation, resulting in a chiral layer. [ABSTRACT FROM AUTHOR]

The title compound, (C6H14N2)[Cr3O10], consists of a diazabicyclo[2.2.2]octane-1,4-diium cation and a discrete trichromate anion linked by an N-H···O hydrogen bond. Three CrO4 tetrahedra are joined via shared O atoms to form the trichromate anion. Supramolecular rings, which can be described by the graph-set motif R44(26), are built via NH···O hydrogen bonds, and C-H···O interactions play lesser roles in forming the structure. [ABSTRACT FROM AUTHOR]