Effect of various ionic strengths on the stabilities of metal mediated ternary complexes

  • Authors

    • Sridarala Ramu Vardhaman college of engineering, Hyderabad, Telangana state, India
    • Yamajala Ram Mohan
  • Intra Molecular Interactions, Ionization Constants, 1, 1 Ligand-Metal-Ligand Complexes, Stability Constants, Stacking Interactions.
  • The stabilities of 1:1:1 ligand-metal-ligand complexes investigated at different ionic strength (KNO3) in the presence of mixed solvent (water50%+dioxane50%) system at temperature 250 centigrade by pH metric titration method. In this investigation copper, nickel, zinc and cobalt used as metal ions, Beta-Hydroxy ketone and Benzotriazole derivatives acted as ligands. Data of present investigation showed that Cu formed more stable complexes; it is followed by Zn and Ni complexes.Co formed less stable complexes. The stabilities of these 1:1:1 ligand-metal-ligand complexes are measured by Δ log K values, Percentage of stacking and intra molecular equilibrium constants.Due to overlapping of –CHâ‚‚CH₃,2-methyl propyl and C6H5CH2- side chains of BHK ligands with aromatic ring of the BTAZ ligands these ligand-metal-ligand complexes attained extra stabilities. The values of Δ log K values for pair of (BHK-Alkyl)/ (BHK-Benzyl)-Metal (II)-(BTAZ-Alkyl-OH) and (BHK-Alkyl)/ (BHK-Benzyl)-Metal (II)-(BTAZ-Phenyl-OH) are alike. This indicates the side chain/aromatic ring of BHK is overlaying with the Benzotriazole ring, but not with the phenyl side chain/aromatic ring of the BTAZ ligand.


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    Ramu, S., & Ram Mohan, Y. (2019). Effect of various ionic strengths on the stabilities of metal mediated ternary complexes. International Journal of Engineering & Technology, 8(1), 8-15. https://doi.org/10.14419/ijet.v8i1.16522