Journal of inclusion phenomena

, Volume 6, Issue 2, pp 119–134 | Cite as

p-t-Butylcalix[4]arene tetra-acetamide: a new strong receptor for alkali cations [1]

  • Arturo Arduini
  • Eleonora Ghidini
  • Andrea Pochini
  • Rocco Ungaro
  • Giovanni Dario Andreetti
  • Gianluca Calestani
  • Franco Ugozzoli
Article

Abstract

From the reaction ofp-t-butylcalix[4]arene with α-chloro-N,N-diethyl acetamide a new lipophilic ether-amide ligand (2) has been obtained in high yield. Solution studies show (2) to be a very strong cation receptor for alkali cations, especially sodium and potassium. The X-ray crystal structure determination of the free ligand (2) and two potassium complexes (KI and KSCN) shows the calix[4]arene in a fixed ‘cone’ structure and the cation completely encapsulated in a polar cavity of eight oxygen atoms.

Key words

p-t-butylcalix[4]arene cation receptor X-ray crystal structure analysis potassium complex 

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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • Arturo Arduini
    • 1
  • Eleonora Ghidini
    • 1
  • Andrea Pochini
    • 1
  • Rocco Ungaro
    • 1
  • Giovanni Dario Andreetti
    • 2
  • Gianluca Calestani
    • 2
  • Franco Ugozzoli
    • 2
  1. 1.Istituto di Chimica Organica Organica dell'Università di ParmaParmaItaly
  2. 2.Istituto di Strutturistica Chimica dell'Università di ParmaCentro di Studio per la Strutturistica Diffrattometrica del C.N.R.ParmaItaly

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