Acta Cryst. (2008). E64, o673  [ doi:10.1107/S1600536808002304 ]

5,11,17,23-Tetra-tert-butyl-25,26,27,28-tetramethoxycalix[4]arene dichloromethane hemisolvate

C. Fischer, T. Gruber, W. Seichter, D. Schindler and E. Weber

Abstract: In the title compound, C₄₈H₆₄O₄·0.5CH₂Cl₂, both crystallographically independent calixarene molecules display a partial cone conformation. Their crystal packing is stabilized by C-H contacts involving the methoxy groups. The solvent molecule is located interstitially between two calixarene units with C-HCl contacts to methoxy and tert-butyl groups. One tert-butyl residue of each calixarene molecule is disordered over two positions (occupancies 0.60/0.40 and 0.63/0.37), resulting in bond distances that deviate from ideal values. The tetramer calixarene molecules present models with approximate non-crystallographic C_s symmetry.

Online 5 March 2008

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