(18-Crown-6)potassium chloro­chromate

The crystal structure of the title compound, (1,4,7,10,13,16-hexaoxacyclo­octadecane-κ⁶O)potassium chloro­chromate(VI), [K(C₁₂H₂₄O₆)][CrClO₃], contains a K⁺ cation, complexed with one crown ether molecule, and a chloro­chromate anion. The cation is located within the mean plane of the ether O atoms, approximately in the centre of the macrocyclic cavity, and bonded to them with K—O distances in the range 2.785 (5)–2.836 (5) Å. In the crystal structure, polymeric chains of the type K⁺–CrO–K⁺ are formed.

([1.5]Dibenzo-18-crown-6)potassium chloro­chromate

The title compound, (6,7,9,10,12,13,15,16-octa­hydro­dibenzo[b,e]-1,4,7,10,13,16-hexa­oxacyclo­octa­decine)­potassium chloro­chromate, [K(C₂₀H₂₄O₆)][CrClO₃], is the complex formed by a K⁺ cation with one crown ether mol­ecule and a chloro­chromate anion. The cation is displaced from the mean plane of the ether O atoms by 0.849 (2) Å towards the anion. It forms coordination bonds with all of the O atoms of the crown ether, as well as with the disordered O and Cl atoms of the anion.