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Journal of Solution Chemistry

, Volume 43, Issue 7, pp 1218–1231 | Cite as

Competitive 7Li NMR Study on the Mn2+, Zn2+ and Cd2+ Complexes of Two New Branched Hexadentate (N6) Amines Containing the Pyridine Moiety in Nitromethane and Acetonitrile Solutions

  • Hassan Keypour
  • Mohammad Hasan Zebarjadian
  • Majid Rezaeivala
  • Mojtaba Shamsipur
  • Hamid Reza Bijanzadeh
Article
  • 120 Downloads

Abstract

Lithium-7 NMR spectroscopy was used to investigate the stoichiometry and stability of a Li+ complex with two new branched amines, 4,7-bis(2-pyridylmethyl)-4,7-diazadecane-1,10-diamine (L1) and 4,8-bis(2-pyridylmethyl)-4,8-diazaundecane-1,11-diamine (L2), in acetonitrile and nitromethane. A competitive 7Li NMR method was also employed to probe the complexation of Mn2+, Zn2+ and Cd2+ ions with L1 and L2 in the same solvent systems. The formation constants of the resulting complexes were evaluated from computer fitting of the mole ratio data with an equation that relates the observed chemical shifts to the formation constant. In both solvents, the stability of the resulting 1:1 complexes was found to vary in the order Cd2+ > Zn2+ > Mn2+ > Li+.

Keywords

Competitive 7Li NMR Complexation Nonaqueous solvent Nitromethane Acetonitrile Pyridine moiety Hexadentate (N6) amines 

Notes

Acknowledgments

We are grateful to the Faculty of Chemistry of Bu-Ali Sina University, Ministry of Science, Research and Technology of Iran for financial support.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Hassan Keypour
    • 1
  • Mohammad Hasan Zebarjadian
    • 1
  • Majid Rezaeivala
    • 2
  • Mojtaba Shamsipur
    • 3
  • Hamid Reza Bijanzadeh
    • 4
  1. 1.Faculty of ChemistryBu-Ali Sina UniversityHamedanIran
  2. 2.Department of Chemical EngineeringHamedan University of TechnologyHamedanIran
  3. 3.Department of ChemistryRazi UniversityKermanshahIran
  4. 4.Department of ChemistryTarbiat Modarres UniversityTehranIran

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