Journal of Thermal Analysis and Calorimetry

, Volume 89, Issue 2, pp 555–559 | Cite as

Orotic acid complexes of Co(II), Ni(II), Zn(II) and Cd(II) with imidazole

Syntheses, spectroscopic and thermal studies
  • O. Z. Yeşilel
  • H. Ölmez
  • H. İçbudak


The [Co(HOr)(H2O)2(im)2] (1), [Ni(HOr)(H2O)2(im)2] (2), [Zn(H2O)2(im)4](H2Or)2 (3) and [Cd(HOr)(H2O)(im)3] (4) complexes (H3Or: orotic acid, im: imidazole) were synthesized and characterized by elemental analysis, magnetic and conductance measurements, UV-vis and IR spectra. The thermal behaviour of the complexes was also studied by simultaneous thermal analysis techniques (TG, DTG and DTA). The orotate ligand (HOr2−) coordinated to the Co(II), Ni(II) and Cd(II) ions are chelated to the deprotonated pyrimidine nitrogen (N(3)) and the carboxylate oxygen, while do not coordinate to the Zn(II) ion is present as a counter-ion (H2Or). The first thermal decomposition process of all the complexes is endothermic deaquation. This stage is followed by partially (or completely) decomposition of the imidazole and orotate ligands. In the later stage, the remained organic residue exothermically burns. On the basis of the first DTGmax, the thermal stability of the complexes follows order: 2, 176°C>1, 162°C>4, 155°C>3, 117°C in static air atmosphere. The final decomposition products which identified by IR spectroscopy were the corresponding metal oxides.


imidazole complexes orotic acid complexes thermal analysis 


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  1. 1.
    P. Karlson, Kurzes Lehrbuch der Biochemie, Thieme, Stuttgart, New York 1988.Google Scholar
  2. 2.
    J. D. Rawn, Biochemistry, Neil Patterson Publishers, Burlington, N. C., USA 1989.Google Scholar
  3. 3.
    D. Szeleny and J. Sos, Arzneim.-Forsch., 21 (1991) 777.Google Scholar
  4. 4.
    M. Sabat, D. Zglinska and B. Jezowska-Trzebiatowska, Acta Cryst., B36 (1980) 1187.Google Scholar
  5. 5.
    A. Karipides and B. Thomas, Acta Cryst., C42 (1986) 1705.Google Scholar
  6. 6.
    T. Solin, K. Matsumoto and K. Fuwa, Bull. Chem. Soc. Jpn., 54 (1984) 3731.CrossRefGoogle Scholar
  7. 7.
    P. Castan, E. Colacio-Rodriguez, A. L. Beauchamp, S. Cros and S. Wimmer, J. Inorg. Biochem., 38 (1990) 225.CrossRefGoogle Scholar
  8. 8.
    P. Arrizabalaga, P. Castan and F. Dahan, Inorg. Chem., 22 (1983) 2245.CrossRefGoogle Scholar
  9. 9.
    O. Kumberger, J. Riede and H. Schmidbaur, Chem. Berichte, 124 (1991) 2739.CrossRefGoogle Scholar
  10. 10.
    I. Mutikainen, R. Hämäläinen, M. Klinga and U. Turpeinen, Z. Kristallogr., 212 (1997) 65.CrossRefGoogle Scholar
  11. 11.
    I. Mutikainen, R. Hämäläinen, M. Klinga, O. Orama and U. Turpeinen, Acta Cryst., C52 (1997) 2480.Google Scholar
  12. 12.
    H. Icbudak, H. Ölmez, O. Z. Yesilel, F. Arslan, P. Naumov, G. Jovanovski, A. R. Ibrahim, A. Usman, H. K. Fun, S. Chantrapromma and S. W. Ng, J. Mol. Struct., 657 (2003) 255.CrossRefGoogle Scholar
  13. 13.
    I. Mutikainen, Inorg. Chim. Acta, 136 (1987) 155.CrossRefGoogle Scholar
  14. 14.
    I. Mutikainen and P. Lumme, Acta Cryst., B36 (1980) 2233.Google Scholar
  15. 15.
    I. Ucar, A. Bulut, O. Z. Yesilel, H. Ölmez and O. Büyükgüngör, Acta Cryst., C60 (2004) m563.Google Scholar
  16. 16.
    X. Li, R. Cao, W. Bi, D. Sun and M. Hong, Acta Cryst., E59 (2003) m228.Google Scholar
  17. 17.
    M. J. Plater, M. R. J. Foreman, J. M. S. Skakle and R. A. Howie, Inorg. Chim. Acta, 332 (2002) 135.CrossRefGoogle Scholar
  18. 18.
    O. Z. Yesilel, H. Ölmez, H. Icbudak and O. Büyükgüngör, Z. Naturforsch., 60b (2005) 1138.Google Scholar
  19. 19.
    P. Castan and T. Ha, Inorg. Chim. Acta, 221 (1994) 173.CrossRefGoogle Scholar
  20. 20.
    O. Z. Yesilel and H. Ölmez, J. Therm. Anal. Cal., OnlineFirst, DOI: 10.1007/S10973-005-7137-2.Google Scholar
  21. 21.
    O. Z. Yesilel, I. Ucar, A. Bulut, H. Ölmez and O. Büyükgüngör, Z. Naturforsch., 61b (2006) 147.Google Scholar
  22. 22.
    H. Ölmez, H. İçbudak, O. Z. Yeşilel, C. Arıcı and D. Ülkü, Z. Kristallogr., 219 (2004) 300.CrossRefGoogle Scholar
  23. 23.
    O. Z. Yesilel, H. Ölmez, I. Ucar, A. Bulut and C. Kazak, Z. Anorg. Allg. Chem., 631 (2005) 3100.CrossRefGoogle Scholar
  24. 24.
    O. Z. Yesilel, F. Tezcan, H. Ölmez, H. Pasaogablu and O. Büyükgüngör, Z. Anorg. Allg. Chem., 631 (2005) 2497.CrossRefGoogle Scholar
  25. 25.
    O. Z. Yesilel and H. Ölmez, Transition Met. Chem., 30 (2005) 992.CrossRefGoogle Scholar
  26. 26.
    D. Sutton, Electrostatic Energy Level Diagrams and the Spectra of Octahedral Complexes. In Electronic Spectra of Transition Metal Complexes, McGraw-Hill, London 1968, p. 115.Google Scholar
  27. 27.
    T. Premkumar and S. Govindarajan, J. Therm. Anal. Cal., 84 (2006) 395.CrossRefGoogle Scholar
  28. 28.
    G. Maistralis, A. Koutsodimou and N. Katsaros, Transition Met. Chem., 25 (2000) 166.CrossRefGoogle Scholar
  29. 29.
    K. Nakamoto, Infrared and Raman Spectra of Inorganic and Coordination Compounds, John Wiley and Sons, New York 1978, p. 448.Google Scholar
  30. 30.
    O. Z. Yesilel, Thesis, Ondokuz Mayıs University (2004).Google Scholar
  31. 31.
    P. Naumov, V. Jordanovska, B. Boyanov and G. Jovanowski, J. Therm. Anal. Cal., 66 (2001) 469.CrossRefGoogle Scholar
  32. 32.
    I. Labádi, Zs. Czibulya, R. Tudose and O. Costisor, J. Therm. Anal. Cal., 78 (2004) 965.Google Scholar
  33. 33.
    M. Olczak-Kobza, A. Dzierzawska-Majewska and J. Karolak-Wojciechowska, J. Coord. Chem., 59 (2006) 545.CrossRefGoogle Scholar
  34. 34.
    V. T. Yılmaz, S. Hamamcı and O. Büyükgüngör, Z. Naturforsch., 61b (2006) 189.Google Scholar

Copyright information

© Springer Science+Business Media LLC 2007

Authors and Affiliations

  1. 1.Department of Chemistry, Faculty of Arts and SciencesEskişehir Osmangazi UniversityEskişehirTurkey
  2. 2.Department of Chemistry, Faculty of Arts and SciencesOndokuz Mayıs UniversityKurupelit, SamsunTurkey

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