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
    2019-01-27
    https://doi.org/10.14419/ijet.v8i1.16522
  • Intra Molecular Interactions, Ionization Constants, 1, 1 Ligand-Metal-Ligand Complexes, Stability Constants, Stacking Interactions.

  • Abstract

    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 –CH₂CH₃,2-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.

     

  • References

    1. [1] B.P.Hay, R.D.Hancock, Coordination chemistry reviews 212(1) (2001) 61-78.https://doi.org/10.1016/S0010-8545(00)00366-0.

      [2] K.Singh, M.S.Barwa, and P.Tyagi, Eur.J.ofMed.Chem. 41(1) (2006) 147-153. https://doi.org/10.1016/j.ejmech.2005.06.006.

      [3] P.C.A.Bruijnincx, and P.J.Sadler, Current opinion in chemical biology 12(2) (2008) 197-206.https://doi.org/10.1016/j.cbpa.2007.11.013.

      [4] F.Hua, S.Kinayyigit and J.R.CableInorg.Chem. 44(3) (2005) 471-473.https://doi.org/10.1021/ic048498j.

      [5] E.Hochuli, H.Dobeli, and A.Schacher, Journal of chromatography A, 411 (1987) 177-184. https://doi.org/10.1016/S0021-9673(00)93969-.

      [6] G,Liang, R.Tribolet, and H.Sigel, Inorg.Chem., 27 (1988) 2877-2887 .

      [7] P.W.Dimmock, P,Warwick, and R.A.Robbins, Analyst, 120 (1995) 2159-2170 .https://doi.org/10.1039/an9952002159.

      [8] B.E.Fischer, and H.Sigel, J.Am.Chem.Soc., 102(9) (1980) 2998-3008 .https://doi.org/10.1021/ja00529a021.

      [9] V.B. Kenche, I. Zawisza and C.L. Masters Inorganic chemistry, 52(8) (2013) 4303-4318.https://doi.org/10.1021/ic302289r

      [10] A.E. Martel and R.J. Motekaitis, “Determination and use of stability constantsâ€, VCH Publishers, New York, (1992).

      [11] PR Mitchell, B Prijs and H Sigel, Helvetica Chimicaacta, 62(6) (2004) 1723-1735. https://doi.org/10.1002/hlca.1979062060.

      [12] Osamu Yamauchi, Akira Odani and Shun Hirota, Bull.Chem.Soc.Japan,74 (2001) 1525-1545https://doi.org/10.1246/bcsj.74.152.

      [13] O.Yamauchi, A. Odani and M.Takani, J. Chem. Soc., Dalton Trans.(2002) 3411-3421.https://doi.org/10.1039/B202385G.

      [14] S.A.Sajadi, B.Song and F.GreganBull.Chem.Soc.Ethiop., 11(2) (1997) 121-130.https://doi.org/10.4314/bcse.v11i2.21020.

      [15] S.S.Massoud and H.Sigel, Inorg.Chim.Acta, 159 (1989) 243-252.https://doi.org/10.4314/bcse.v11i2.21020.

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  • How to Cite

    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