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Ditopic Calixcrowns with Inequivalent Crown Loops: Synthesis and Structural Characterisation of an Unsymmetrical Calix[4]arene biscrown-6

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Abstract

Consecutive base-catalysed reactions of calix[4]arene with the ditosylates of two different polyetherdiols result in the relatively efficient production of an unsymmetrical calix biscrown-6 which, after reduction of an ethoxycarbonyl substituent to an hydroxymethyl group, has been characterised structurally by a room-temperature, single crystal X-ray study of its chloroform solvate. Crystals of ( 4), C53H62O13... ∼0.57CHCl3, are triclinic, P¯1, a 18.95(3), b 12.394(9), c 11.756(7) Å α 106.93(5), β 101.77(8), γ 94.63(8)°, Z = 2; R was 0.088 for 2231 ’observed' (I > 3σ(I)) diffractometer data.

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Authors and Affiliations

  1. ECPM, URA 405 du CNRS, F-67008, Strasbourg, France

    Zouhair Asfari, Xavier Nicolle, Jacques Vicens & Allan H. White

  2. S.E.P./S.E.T.E. Centre d'Etudes de Cadarache, C.E.A., 13108, Saint-Paul-lez-Durance, France

    Jean-françois Dozol & Anne Duhart

  3. Research Centre for Advanced Mineral and Materials Processing, University of Western Australia, Nedlands, W.A, 6907

    Jack M. Harrowfield

  4. Department of Chemistry, University of Western Australia, Nedlands, W.A, 6907

    Brian W. Skelton

Authors
  1. Zouhair Asfari
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  2. Xavier Nicolle
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  3. Jacques Vicens
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  4. Jean-françois Dozol
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  8. Allan H. White
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Asfari, Z., Nicolle, X., Vicens, J. et al. Ditopic Calixcrowns with Inequivalent Crown Loops: Synthesis and Structural Characterisation of an Unsymmetrical Calix[4]arene biscrown-6. Journal of Inclusion Phenomena 33, 251–262 (1999). https://doi.org/10.1023/A:1008062510582

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