EFFECT OF MIXED SOLVENT SYSTEM ON INTRAMOLECULAR INTERACTIONS OF METAL MEDIATED TERNARY COMPLEXES OF BETA-HYDROXY KETONE DERIVATIVES AND BENZOTRIAZOLE DERIVATIVES IN SOLUTION.

  • Professor, Department of Humanities and Sciences, Vardhaman College of Engineering, Shamshabad, Hyderabad-501218, Telangana State, India.
  • Assistant Professor, Department of Humanities and Sciences, Vardhaman College of Engineering, Shamshabad, Hyderabad-501218, Telangana State, India.
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The stabilities of ternary complexes of metal ions (copper, nickel, zinc and cobalt) with beta-hydroxy ketone(BHK) derivatives and benzotriazole(BTAZ) derivatives in various mixed solvent systems (Water+Dioxane) medium in 0.1 M KNO3 ionic strength at 250C using pH metric titration method have been established. The data reveal that the copper forms more stable complexes, which is followed by zinc and Ni complexes with these ligands. Cobalt form less stable complexes with these ligands. The stabilities of these complexes are further quantified with Δ log K values, intra-molecular equilibrium constants and percentage of stacking interaction in the ternary systems. The observed positive Δ log K values suggest that the flexible side chain alkyl moiety (ethyl group, butyl group) or aromatic moiety (phenyl group) in BHK ligand overlaps with the fixed aromatic moiety of BTAZ ligand in the ternary complex, which results in the enhanced stabilities for the (BHK-Alk)-Metal(II)-BTAZ and (BHK-Ph)-Metal(II)-BTAZ systems. Interestingly, the positive Δ log K values for both BHK-Alk and BHK-Ph ligands in their corresponding ternary complexes are about the same. This suggests the flexible Alkyl or phenyl side chain of BHK is overlapping with the triazole ring, but not the phenoxy ring of the BTAZ ligand.


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Sridarala ramu and siddhartha marupati. (2017); EFFECT OF MIXED SOLVENT SYSTEM ON INTRAMOLECULAR INTERACTIONS OF METAL MEDIATED TERNARY COMPLEXES OF BETA-HYDROXY KETONE DERIVATIVES AND BENZOTRIAZOLE DERIVATIVES IN SOLUTION., Int. J. of Adv. Res., 5 (05), 1444-1457, ISSN 2320-5407. DOI URL: https://dx.doi.org/10.21474/IJAR01/4266


Dr. SRIDARALA RAMU
PROFESSOR, DEPARTMENT OF HUMANITIES AND SCIENCES, VARDHAMAN COLLEGE OF ENGINEERING, SHAMSHABAD, TELANGANA STATE, HYDERABAD, INDIA

DOI:


Article DOI: 10.21474/IJAR01/4266      
DOI URL: https://dx.doi.org/10.21474/IJAR01/4266