Spectroscopic and crystallographic study of 27,28-diethoxy-p-tert-butylcalix[4]arenes


Kanters, J.A. and Schouten, A. and Steinwender, E. and Maas, J.H. and Groenen, L.C. and Reinhoudt, D.N. (1992) Spectroscopic and crystallographic study of 27,28-diethoxy-p-tert-butylcalix[4]arenes. Journal of Molecular Structure, 269 (1-2). pp. 49-64. ISSN 0022-2860

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Abstract:The molecular conformation of the anti form of the title compound, i.e. with the two neighbouring phenylethylether fragments in anti positions, is a partial cone. The conformation is stabilized by two intramolecular hydrogen bonds. These bonds involve both the phenolic OH groups as donors and a hydroxyl group and an ethoxygroup as acceptors. FT-IR solid state spectra reveal two OH bands at 3388 and 3175 cm¿1 which is in accordance with the observed hydrogen-bond configuration. In CCl4 solution the partial cone is preserved for the anti form (3378 and 3187 cm¿1) while the corresponding syn form mainly adopts a cone conformation characterized by O---H stretching vibrations at 3360 and 3168 cm¿1.
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Copyright:© 1992 Elsevier Science
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Link to this item:http://purl.utwente.nl/publications/12553
Official URL:https://doi.org/10.1016/0022-2860(92)80004-2
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