Diazabicyclo[2.2.2]octane-1,4-diium dichromate

Abstract

The title compound, (C(6)H(14)N(2))[Cr(2)O(7)], 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 CrO(4) 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.

Synthesis and structural characterization oftris(ethylenediamine)nickel(II) dichromate

“…The acentric nature of the CrO 4 tetrahedron has been exploited by the Poeppelmeier group to create new non-centrosymmetric materials [3][4][5]. The flexibility of CrO 4 to exist in several different structural environments can be evidenced by the structural characterization of dichromates and chromates with a variety of counter cations, which include pure inorganic cations , organic ammonium cations [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45], and hybrid organicinorganic complex cations [3][4][5][46][47][48][49]. In the present study, we have investigated the reactions of potassium dichromate and potassium chromate with tris(ethylenediamine)nickel(II) dichloride dihydrate and characterized two new Cr(VI) compounds.…”