X-ray crystallographic studies of a 1,3-alternate-calix[4]arene·Na+ complex. Is the cation-π interaction operative between the benzene rings and Na+?

Atsushi Ikeda, Hirohisa Tsuzuki, Seiji Shinkai

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The structure of a 1,3-alternate-calix[4]arene·Na+ complex was determined by X-ray crystallography for the first time. It showed that two well-preorganized oxygen bases (OCH2CO groups) contribute to the Na+-binding whereas two π-basic benzene rings, unlike those for the K+ complex, are not involved. The complex adopts a highly symmetrical structure, which is the origin of the facile "Na+-tunneling" across the 1,3-alternate-calix[4]arene cavity.

Original languageEnglish
Pages (from-to)8417-8420
Number of pages4
JournalTetrahedron Letters
Issue number45
Publication statusPublished - Nov 7 1994


All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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