Abstract
3,4,5-Trimethoxybenzyl alcohol was cyclooligomerized with a bentonite clay used as a catalyst. Results of the crystal structure analysis of the racemic (±) nonamethoxy[1,1,1]orthocyclophane trimer, C30H36O9, are described. The structure was determined by X-ray diffraction at 293 K and shown to belong to the triclinic space group P\(\bar 1\). The compound possesses a distorted crown conformation with unusual C−H...O intermolecular interactions, and with a crystal packing not observed before in other related derivatives. The racemic mixture was also discriminated in its two enantiomeric isomers, using proton NMR and Eu(III) as a chiral shift reagent.
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Salmón, M., Cabrera, A., Zavala, N. et al. X-ray crystal structure and1H-NMR chiral shift reagent study of a crown trimer. J Chem Crystallogr 25, 759–762 (1995). https://doi.org/10.1007/BF01670332
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DOI: https://doi.org/10.1007/BF01670332