Acta Cryst. (2006). E62, m560-m562  [ doi:10.1107/S1600536806005137 ]

Potassium (4-methyl-2-oxo-2H-chromen-7-yloxy)sulfate

K. Sieroslawski, K. Slepokura and T. Lis

Abstract: In the title compound, K⁺·C₁₀H₇O₆S^-, the sulfate S atom is located in the plane defined by the rest of the anion. This uncommon geometry is accompanied by the existence of a bifurcated three-centered intramolecular C-HO interaction involving two of the sulfate O atoms. The combination of intra- and intermolecular contacts gives rise to R₄⁵(24) rings and folded layers parallel to (010), in which one of the sulfate O atoms and the carbonyl O atom act as acceptors. The stabilization of the crystal structure along the b axis comes from the coordination of the anions to the potassium cations and is assisted by - stacking interactions between layers.

Online 22 February 2006

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