Copper(II), nickel(II), cobalt(II) and zinc(II) complexes of 2-[2-(6-methylbenzothiazolyl)azo]-5-dimethylaminobenzoic acid: synthesis, spectral, thermal and molecular modelling studies

Abstract

Complexes of copper(II), nickel(II), cobalt(II), and zinc(II) with 2-[2-(6-methylbenzothiazolyl)azo]-5-dimethylaminobenzoic acid have been prepared and characterized by elemental analysis, vibrational spectra, magnetic susceptibility measurements, conductance measurements and e.p.r. spectra. Stability constants have been evaluated potentiometrically. Electronic spectra, magnetic susceptibility measurements and molecular modeling studies support a distorted square planar geometry around the metal ions. Vibrational spectra indicate the coordination of the azo group, nitrogen of benzothiazole, the carboxylate anion and the acetate ion on complexation with the metal ion. All complexes are found to be monomers. The stability of the complexes follow the order: copper(II) > nickel(II) > cobalt(II) > zinc(II).

This is a preview of subscription content, log in to check access.

References

  1. 1.

    H.R. Hovind (1975) The Analyst 100 769

    Google Scholar 

  2. 2.

    E. Bishop (Eds) (1972) Indicators Pergamon Press Oxford

    Google Scholar 

  3. 3.

    Y. Nakamura J. Murata (1993) Jpn Kokaikoho 5 155

    Google Scholar 

  4. 4.

    E. Hahn M. Weisenfelat H. Reichelt S. Gruellner (1993) German Offen. 4 120

    Google Scholar 

  5. 5.

    H. Tsien K.-P. Chu H. Chang (1997) VS patent 5 652

    Google Scholar 

  6. 6.

    R. Podsiadly J. Sokolowska (2003) Color Technol. 119 341

    Google Scholar 

  7. 7.

    M.S. Carvelho S.I.C. Fraga K.C.M. Neto E.Q. Silva Filho (1996) Talanta 43 1675

    Google Scholar 

  8. 8.

    S.L.C. Ferreira C.F. Brito Particlede A.F. Dantas N.M. Lopo de Araujo A.C. Spinola Costa (1999) Talanta 48 1173

    Google Scholar 

  9. 9.

    H. Park E.-R. Kim D.J. Kim H. Lee (2002) Bull. Chem. Soc. Jpn. 75 2067

    Google Scholar 

  10. 10.

    A.I. Loaila-Perez V. Trapani C. Hose S.S. Singh J.B. Trepel M.F.G. Stevens T.D. Bradshaw E.A. Sausville (2002) Mol. Pharmacol. 61 13

    Google Scholar 

  11. 11.

    I. Hutchison S.A. Jennings B.R. Vishnuvajjala A.D. Westwell M.G.F. Stevens (2002) J. Med. Chem. 45 744

    Google Scholar 

  12. 12.

    A.W. Coats J.P. Redfern (1964) Nature 20 68

    Google Scholar 

  13. 13.

    H.M. Irving and Rossotti H.S., J. Chem. Soc., 2904 (1954)

  14. 14.

    M. Furukawa (1982) Anal. Chim. Acta 140 281

    Google Scholar 

  15. 15.

    D. Das A.K. Das C. Sinha (1999) Anal. Lett. 32 567

    Google Scholar 

  16. 16.

    S. Pal D. Das C. Sinha C.H.L. Rennard (2001) Inorg. Chim. Acta. 21 3113

    Google Scholar 

  17. 17.

    K. Nakamoto (1986) Infrared and Raman spectra of inorganic and Coordination Compounds Wiley-Interscience New York

    Google Scholar 

  18. 18.

    M. Goodgame and Weeks M.J., J. Chem. Soc., A 1156, (1966).

  19. 19.

    A.H. Amrallah R.M. Awadallah E.Y. El-Haty (1994) Transit. Metal. Chem. 19 173

    Google Scholar 

  20. 20.

    T.A. Kabanas and Trangaris J.M., J. Coord. Chem., 1389 (1984).

  21. 21.

    D.N. Kumar B.S. Garg (2002) J. Therm. Anal. Calorim. 69 607

    Google Scholar 

  22. 22.

    M.S. Masoud A.R. Yousseff (1988) Transit. Metal. Chem. 13 235

    Google Scholar 

  23. 23.

    R.A. Krause K. Krause (1982) Inorg. Chem. 21 1714

    Google Scholar 

  24. 24.

    S.S. Kandil G.B. El. Hefnawy E.A. Bakr A.Z. Abou El-Ezz (2003) Transit. Metal Chem. 28 168

    Google Scholar 

  25. 25.

    D. Kivelson and Nelman R.R., J. Chem. Soc. A, 1673 (1968).

  26. 26.

    H.M. Irving and Williams R.J.P., J. Chem. Soc., 3192 (1953).

  27. 27.

    W.J. Geary (1971) Coordin Chem Rev. 17 81

    Google Scholar 

  28. 28.

    B.J. Hathaway and Tomlinsin A.A.G., Coordin. Chem. Rev., 51 (1970).

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Bhagwan S. Garg.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Garg, B.S., Sharma, R.K. & Kundra, E. Copper(II), nickel(II), cobalt(II) and zinc(II) complexes of 2-[2-(6-methylbenzothiazolyl)azo]-5-dimethylaminobenzoic acid: synthesis, spectral, thermal and molecular modelling studies. Transition Met Chem 30, 552–559 (2005). https://doi.org/10.1007/s11243-005-2662-1

Download citation

Keywords

  • Copper
  • Zinc
  • Nickel
  • Cobalt
  • Magnetic Susceptibility