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Complexation of Ba2+, Pb2+, Cd2+, and UO22+ Ions with 18-Crown-6 and Dicyclohexyl-18-Crown-6 in Nitromethane and Acetonitrile Solutions by a Competitive NMR Technique Using the 7Li Nucleus as a Probe

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Abstract

[7Li] NMR measurements were used to determine the stoichiometry and stability of Li+ complexes with 18-crown-6 and dicyclohexyl-18-crown-6 in nitromethane and acetonitrile solutions. A competitive [7Li] NMR technique was also employed to probe the complexation of Ba2+, Pb2+, Cd2+, and UO2 2+ ions with the same crown ethers–solvent systems. All the resulting 1 : 1 complexes were more stable in nitromethane than acetonitrile solution. In all cases, the stability of both crown complexes in nitromethane and acetonitrile varied in the order Pb2+ > Ba2+ > Li+ > Cd2+ > UO2 2+.

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Authors and Affiliations

  1. Department of Chemistry, Bu-Ali Sina University, Hamadan, Iran

    Ebrahim Karkhaneei & Mohammad Hasan Zebarjadian

  2. Department of Chemistry, Razi University, Kermanshah, Iran

    Mojtaba Shamsipur

Authors
  1. Ebrahim Karkhaneei
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  2. Mohammad Hasan Zebarjadian
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  3. Mojtaba Shamsipur
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Karkhaneei, E., Zebarjadian, M.H. & Shamsipur, M. Complexation of Ba2+, Pb2+, Cd2+, and UO22+ Ions with 18-Crown-6 and Dicyclohexyl-18-Crown-6 in Nitromethane and Acetonitrile Solutions by a Competitive NMR Technique Using the 7Li Nucleus as a Probe. Journal of Solution Chemistry 30, 323–333 (2001). https://doi.org/10.1023/A:1010323106004

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