Acta Cryst. (2003). E59, m336-m338  [ doi:10.1107/S1600536803009784 ]

Tetrasodium tetrahydroxytetrathiacalix[4]arenetetrasulfonate tetradecahydrate

H. Akashi and T. Yamauchi

Abstract: The title compound, 4Na⁺·C₂₄H₁₂O₁₆S₈^4-·14H₂O (Na₄TCAS·14H₂O), was found to crystallize in the triclinic space group P. The X-ray structure revealed that the centrosymmetric TCAS^4- anion adopts the 1,2-alternate conformation. The sodium cations are surrounded by five or six O atoms in the crystal structure. All sodium ions form centrosymmetric aqua-bridged dimers, Na(-H₂O)₂Na, which are also coordinated by sulfonate O atoms and contribute to the formation of a three-dimensional network. The compound exists in the solid state as layers of anionic thiacalixarenes, alternating with inorganic layers that contain sodium cations and water molecules. Intercalation of metal ions into the solid-state layered structure was observed.

Online 16 May 2003

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