Titanium carboxylate complexes stability constants estimated by four graphical methods

  • Abstract
  • Keywords
  • References
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  • Abstract

    This investigation represents a comparative study of four graphical methods for overall stability constant estimation techniques, included point wise calculation method, half integral method, linear plot method and least squares method, in purpose to select the most sensitive and accurate method, the paper aiming also to determine the parameters that affect the precision of these methods under investigation.

    Metal-ligand stability constant and stoichiometries of above systems are to be determined by Calvin and Bjerrum pH-metric titration technique as adopted by Irving and Rossotti. For this purpose titanium has been chosen as a central metal ion. Titanium element from first transition series of d-block and has four valence bond electrons 3d24s2.

    Acetic acid, oxalic acid and oxalacetic acid have been selected as ligands. The obtained results seem in a good agreement with each other, with some restriction on least squares method for accumulation of error in Kn-1. These suggestions have been introduced in conclusion for treatment of data by least squares method and Henderson's Hasselbalch's equation and other modifications have been done.

  • Keywords

    Oxalacetic Acid; Titanium Caboxylates; Graphical Methods; Mat-Lab Program.

  • References

    1. E-book: Gurdeep, Raj, 1986.Advance inorganic chemistry-Ⅱ, first ed. Satyendra Rastogi “Mitra” p.67.Book code : 277-12 Ninth thoroughly revised 2004Twelfth ed. 2010
    2. F. J. C. Rossotti, H. S. Rossotti. 1955. Graphical methods for determining equilibrium constants.1- system of mononuclear complexes. Ac. chem. scandinavica. 9, 1166-1176.
    3. F.R.,‘Hartley, C. Burgess, R.M. Alcock.1980. Solution equilibria, first ed. John Wiley and sons, New York.
    4. A.K. Maldhure, S.S. Agarkar, R.K. Taywade, R.S. Wankhade. (2012). Metal-ligand stability constants of Co(Ⅱ), Ni(Ⅱ) and Cu(Ⅱ) metal ion complexes with N-(5-methyl-2-hydroxyacetophenone)-N-(2-hydroxyacetophenone).J. Chem. pharm. Res. 4, (8), 3865-3868.
    5. Sumer D. Thakur, Devidas, T. Mahajan, Kamlesh P. Munot, Rajesh, D. Deshmukh. 2011a. Studies in influence of ionic strength of medium on complex equilibria in substituted hydroxyl-1-3-propandiones with Cr (Ⅲ) and La (Ⅲ) metal ions pH-metrically. Der pharma chem. 3, (6), 165-173.
    6. Santosh, D. Deosarkar, Ashok, B. Kalambe, Vijay, J. Thakare, Shivraj, G. Wanale, Vinay, V. Hiwase. 2011. Potentiometric studies of electrolyte effects on complex equilibria of some substituted 5-(2-hydroxy phenyl) Pyrazoles. Der pharma chemic. 3, (6), 75-83. Minaxi, Maru, M.K. Shah. 2011. Synthesis and physic-chemical studies of some divalent transition metal complexes of 2-(2’-chloro-6’-substituted quinoliny)-1H-benzo[d]imidazole ligands. J. Chem. Res. 2, (2), 14-27.
    7. Ashwini, kumar, Ashok, Kumar, Malik. 2007. Potentiometric studies on the complexes of Cu (Ⅱ), Cd (Ⅱ), Co (Ⅱ), Ni (Ⅱ), Pb (Ⅱ), and Zn (Ⅱ) with Gabapentin. Euras. J. analy. Chem. 2, (2), 1-6.
    8. Avinash, Ramteke, Marutil, Narwade. 2013. Studies of stability constants of complexes of chlorosubstituted pyrazoles and pyrazoline with Cu (Ⅱ), Ni (Ⅱ), Co (Ⅱ) and Nd (Ⅱ) metal ions in 70% dioxane- water mixture at 0.1 ionic strength. Arch. of appl. Sc. 5, (1), 231-237.
    9. Abdulbaset, A. Zaid, Mazahar, Farooqui, D.M. Janrao. 2012. Study of stability constant of biological active molecules (drug) using potentiometric titration technique. J. of chem. boils. phys. Sc. 2, (1), 67-81. Sayyed, Hussain, Abdul Rahim, Mazahar, Farooqui. 2011. Studies of binary complexes of metal ions with mandelic acid by potentiometry. Chem. J. 02, (6), 206-209. G. V., Mane, L.P. shinde, D.G. Kolhatkar. 2011. pH-metric study of proton-ligand and metal-ligand stability constant complexes of transition and inner transition metal ions with some organic acids.Inter. J. Chemistry. 3, (2), 181-187.
    10. Sumer, D. Thakur, Devidas, T. Mahajan, Kamlesh, P. Munot, Rajesh D. Deshmukh, Mangesh, S. Tihile. 2011b. Metal-ligand stability constants of Th (Ⅲ), Sm (Ⅲ), Nd (Ⅲ) and Pr (Ⅲ) metal ion complexes with two mercapto-4-substituted phenyl-6-substituted phenyl prymidines at 0.1M ionic strength pH-metrically. Der pharma chem. 3, (6), 382-389.
    11. Anjani, Kumar, Mishra, Prem, Mohan, Mishra, Sunil, K. Misra. 2011. Equilibrium studies on bivalent transition metal chelates with biologically active schiff’s base of heterocyclic aldehydes. Ras. J. Chem. 4, (2), 303-319.
    12. Anil, B. Naik, Maroti, Narwade. 2008. Studies on influence of dielectric constants on complex equilibria between substituted pyrazalines and lanthanide metal ions pH-metrically.Amer.-Euras. scient. Res. 3, (2), 212-216.




Article ID: 3750
DOI: 10.14419/ijbas.v3i4.3750

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