Journal of Solution Chemistry

, Volume 44, Issue 8, pp 1673–1704 | Cite as

Mixed Ligand Complex Formation of Cetirizine Drug with Bivalent Transition Metal(II) Ions in the Presence of 2-Aminomethylbenzimidazole: Synthesis, Structural, Biological, pH-Metric and Thermodynamic Studies

  • Abeer T. Abdelkarim
  • Mohammed M. Al-Shomrani
  • Ahmed M. RayanEmail author
  • Ahmed A. El-Sherif


Mononuclear copper(II), cobalt(II) and nickel(II) complexes of cetirizine (CTZ = 2-[2-[4-[(4-chlorophenyl)phenyl methyl]-piperazine-1-yl]-ethoxy]acetic acid) in the presence of 2-aminomethyl-benzimidazole·2HCl (AMBI), as a representative example of heterocyclic bases, were synthesized and studied by different physical techniques. All mixed-ligand complexes have been fully characterized with the help of elemental analyses, molecular weight determinations, molar conductance, magnetic moments and spectroscopic data. The formulae of the isolated complexes are [M(AMBI)(CTZ)(NO3)(H2O)2nH2O where AMBI is the neutral bidentate 2-aminomethylbenzimidazole, CTZ the deprotonated cetirizine and n = 1 for Co(II) or 0 for Cu(II) and Ni(II) complexes. The measured molar conductance values in DMSO indicate that the complexes are non-electrolytes. The formation equilibria of the ternary complexes have been investigated. Ternary complexes are formed by a simultaneous mechanism. Stoichiometry and stability constants for the complexes formed are reported. The concentration distribution of the complexes in solution was evaluated as a function of pH. The thermodynamic parameters were calculated from the temperature dependence of the equilibrium constants and are discussed. The synthesized metal chelates have been screened for their antimicrobial activities against the selected types of Gram-positive (G+) and Gram-negative (G) bacteria. They were found to be more active against Gram positive than Gram negative bacteria. The antimicrobial activity in terms of metal ions obeys this order: Cu(II) > Ni(II) > Co(II).


Cetirizine Potentiometry Benzimidazole Electronic spectra Conductance Biological activity 


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Abeer T. Abdelkarim
    • 1
  • Mohammed M. Al-Shomrani
    • 2
  • Ahmed M. Rayan
    • 3
    • 4
    Email author
  • Ahmed A. El-Sherif
    • 1
  1. 1.Department of Chemistry, Faculty of ScienceCairo UniversityGizaEgypt
  2. 2.Department of Mathematics, Faculty of ScienceKing Abdulaziz UniversityJeddahKingdom of Saudi Arabia
  3. 3.Department of Chemistry, Faculty of Arts and ScienceNorthern Border UniversityRafha-156Kingdom of Saudi Arabia
  4. 4.Department of Science and Mathematics, Faculty of EducationUniversity of AssiutThe New ValleyEgypt

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