Formation Constants of Complexes of Monovalent Cations with Benzocrown Ethers in Nitromethane

  • H. D. Inerowicz
  • J. Chojnacki
  • A. Merz
  • T. Futterer


The complexation reactions between the macrocyclic polyethers dibenzo-18-crown-6, benzo-18-crown-6, benzo-15-crown-5 and polyethers bearing a stilbene unit with alkali metal and silver cations have been studied conductometrically in nitromethane. The formation constants of 1 : 1 and 1 : 2 (metal : ligand) complexes were determined and found to decrease with increasing cation diameter. The stability of the stilbene crown – metal cation complexes is lower than for complexes of other investigated crown ethers with analogous cations. There seem to be some effects of double bond-silver ion interactions.

formation constants stilbene crown ethers conductometric titration alkali metal cations silver cation nitromethane 


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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • H. D. Inerowicz
    • 1
  • J. Chojnacki
    • 2
  • A. Merz
    • 1
  • T. Futterer
    • 1
  1. 1.Institute of Organic ChemistryUniversity of RegensburgRegensburgGermany
  2. 2.Department of ChemistryTechnical University of GdanskGdanskPoland

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