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A di-aza-benzo crown ether derived fromp-tert-butyl calix[4]arene. Synthesis and complexation of zinc cation

  • Ratana Seangprasertkij
  • Zouhair Asfari
  • Jacques Vicens
Research Communication

Abstract

Di-aza-benzo crown etherp-tert-butyl calix[4]arene (1) has been prepared by hydrogenating the already known Schiff-base precursor (2). The metal ion complexing ability of (1) toward zinc cation is presented. The formation of a 2:1 (Zn: (1) complex and the location of zinc cations were deduced from1H-NMR investigations.

Key words

1,3-Bridgedp-tert-butyl calix[4]arene complexation of zinc cation 

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References

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    The solutions for NMR complexation study were prepared by adding the methanol solution of Zn(CLO4)2. 6H2O into the chloroform solution of (1) so that the Zn2+: (1) mole ratio varied from 0 to 6. The concentration of (1) remained constant at 2.0×10−2M. The spectra were followed until no more shifts were observed after 26 days.Google Scholar
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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Ratana Seangprasertkij
    • 1
  • Zouhair Asfari
    • 2
  • Jacques Vicens
    • 2
  1. 1.Department of ChemistryChulalongkorn UniversityBangkokThailand
  2. 2.E.H.I.C.S.URA 405 du C.N.R.S.StrasbourgFrance

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