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South African Journal of Chemistry

versión On-line ISSN 1996-840X
versión impresa ISSN 0379-4350

S.Afr.j.chem. (Online) vol.65  Durban  2012

 

RESEARCH ARTICLE

 

Ternary complexes of some divalent metal ions with potentially tridentate ligands in dioxane-water mixtures

 

 

B. Ananda Kumar; S. Raju; K. Bharath Kumar Naik; G. Nageswara Rao*

Department of Inorganic and Analytical Chemistry, School of Chemistry, Andhra University, Visakhapatnam-530003, India

 

 


ABSTRACT

Chemical speciation of mixed ligand complexes of Ca(II), Mg(II) and Zn(II) with L-histidine and L-glutamic acid have been studied in varying concentrations (0.0-60.0 % v/v) of 1, 4-dioxane-water mixtures maintaining an ionic strength of 0.16 mol L-1 sodium chloride at 303.0 K. Titrations were carried out in the presence of different relative concentrations (M:L:X = 1.0:2.5:2.5, 1.0:2.5:5.0, 1.0:5.0:2.5) of metal (M) to L-histidine (L) to L-glutamic acid (X) with sodium hydroxide. Stability constants of ternary complexes were refined with MINIQUAD75. The best-fit chemical models were selected based on statistical parameters and residual analysis. The predominant species detected were ML2XH2, MLXH2 and MLX2 for Ca(II), Mg(II) and Zn(II). The formation and distribution of different species with relative concentrations of metal and ligands with varying pH are represented in the form of distribution diagrams. The influence of the solvent on the speciation is discussed in terms of the dielectric constant of the medium.

Keywords: Speciation, mixed ligand complexes, L-histidine, L-glutamic acid, essential metals, dioxane


 

 

Full text available only in PDF format.

 

Acknowledgements

The authors (BAK, SR and KBKN) thank the University Grants Commission, New Delhi, India, for financial support in the form of a Fellowship under the Faculty Development Programme.

 

References

1 H. Sigel, R.B. Martin, R. Tribolet, U.K. Haring and R.M. Balakrishnan, Eur. J. Biochem., 1985, 152, 187-194.         [ Links ]

2. S.B. Ronald and G.N. Rao, Proc. Nat. Acad. Sci. India, 2002, 72, 301-313.         [ Links ]

3 S.B. Ronald and G.N. Rao, J. Indian Chem. Soc., 2002, 79, 799-801.         [ Links ]

4 M.S. Babu, G.N. Rao, K.V Ramana and M.S.P. Rao, Proc. Nat. Acad. Sci. India, 2003, 73, 173-184.         [ Links ]

5 B.B.V Sailaja, T. Kebede, G.N. Rao and M.S.P Rao, Proc. Nat. Acad. Sci., 2004, 74, 399-412.         [ Links ]

6 G.N. Rao and K.G. Sudarsan, Chem. Speciaton Bioavail., 2006, 18, 71-76.         [ Links ]

7 A. Satako, T. Abe, T. Yoshioka and S. Kyoritsu, Busshitsu to Shite, 2003, 107-136.         [ Links ]

8 V Sauvinet, S. Parrot, N. Benturquia, E. Bravo-Moraton, B. Renaud and L. Denoroy, Electrophoresis, 2003, 243, 187-3196.         [ Links ]

9 K. Ajito, C. Han and K. Torimitsu, Anal. Chem., 2004, 76, 2506-2510.         [ Links ]

10 C.M. Weaver and R.P. Heaney, Calcium, in Modern Nutrition in Health and Disease, (M.E. Shils, M. Shike, A.C. Ross, B. Caballero and R.J. Cousins, eds.), 10th edn., Lippincott Williams & Wilkins, Baltimore MD, 2006, pp. 194-210.         [ Links ]

11 H. Marschner, Mineral Nutrition in Higher Plants, Academic Press, San Diego, 1995.         [ Links ]

12 L.S. Valberg, J.M. Holt, E. Paulson and J. Szivek, J. Clin. Invest., 1965, 44, 379-389.         [ Links ]

13 G.V Iyengar, WE. Kollmer and H.J.M. Bowen, The Elemental Composition of Human Tissues and Body Fluids, Weinheim, Verlag Chemie, NY, 1978.         [ Links ]

14 R. Stelzer, H. Lehmann, D. Krammer and U. Luttge, Botanica Acta, 1990, 103, 415-423.         [ Links ]

15 O. Shaul, D.W. Hilgemann, J. De-Almeida-Engler, M.M. Van, D. Inze and G. Galili, EMBO J., 1999, 18, 3973-3980.         [ Links ]

16 R.C. Thomas, J.A. Coles and J.W. Deitmer, Nature, 1991, 350, 564.         [ Links ]

17 B.L. Vallee and K.H. Falchuk, Physiol. Rev.. 1993, 73, 79-118.         [ Links ]

18 H. Vahrenkamp, Chem. Unserer Zeit, 1988, 22, 73-84.         [ Links ]

19 D.S. Auld, Biometals, 2001, 14, 271-313.         [ Links ]

20 B.A. Kumar, S. Raju, K.B.K. Naik and G.N. Rao, IUP J. Chem.. 2011,4, 20-33.         [ Links ]

21 B.A. Kumar, K.B.K. Naik, S. Raju and G.N. Rao, Chem. Speciation. Bioavail., 2011, 24, 139-146.         [ Links ]

22 B.A. Kumar, S. Raju, K.B.K. Naik and G.N. Rao, J. Indian Chem. Soc, 2012, 89, 959-961.         [ Links ]

23 R.S. Rao and G.N. Rao, Computer Applications in Chemistry, Himalaya Publishing House, Mumbai, India, 2005, pp. 277-352.         [ Links ]

24 G. Gran, Analyst, 1952, 77, 661-671.         [ Links ]

25 G. Gran, Anal. Chim. Acta, 1988, 206, 111-123.         [ Links ]

26 B. Srikanth, P.S. Rao, VS. Rao, C.K. Sastry and G.N. Rao, J. Serb. Chem. Soc., 2009, 74, 745-754.         [ Links ]

27 G.N. Rao, Complex Equilibria of some Biologically Important Metal Ions in aquo-organic media, Ph.D. thesis, Andhra University, Visakhapatnam, India, 1989.         [ Links ]

28 M.M. Ruidiaz and R.F. Martinez, Vitae, 2009, 16, 327-337.         [ Links ]

29 S. Raju, K.B.K. Naik, B.A. Kumar and G.N. Rao, S. Afr. J. Chem., 2011, 64, 132-138.         [ Links ]

30 P. Gans, A. Sabatini and A. Vacca, Inorg. Chim. Acta, 1976, 18, 237-241.         [ Links ]

31 Y.Y. Akhadov, Dielectric Properties of Binary Solutions, Pergamon Press, Oxford, NY, 1980.         [ Links ]

32 G.N. Rao and R.S. Rao, J. Teach. Res. Chem., 1995, 2, 15-28.         [ Links ]

33 M. Born, Z. Phys., 1920, 1, 45-57.         [ Links ]

34 R. Griesser and H. Sigel, Inorg. Chem., 1970, 9, 1238-1243.         [ Links ]

35 R. Griesser and H. Sigel, Inorg. Chem., 1971, 10, 2229-2232.         [ Links ]

36 H. Sigel, R. Caraco and B. Prijs, Inorg. Chem., 1974, 13, 462-465.         [ Links ]

37 H. Sigel, P.R. Huber, R. Greisser and B. Prijs, Inorg. Chem., 1973, 12, 1198-1200.         [ Links ]

38 S. Kida, Bull. Chem. Soc. Jpn., 1956, 29, 805-811.         [ Links ]

39 T. Sakurai, O. Yamauchi and A. Nakahara, Bull. Chem. Soc. Jpn., 1976, 49, 169-173.         [ Links ]

40 T. Sakurai, O. Yamauchi and A. Nakahara, Bull. Chem. Soc. Jpn., 1977, 50, 1776-1779.         [ Links ]

 

 

Received 25 October 2011
Revised 20 April 2012
Accepted 26 July 2012

 

 

* To whom correspondence should be addressed. E-mail: gollapallinr@yahoo.com

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