Journal of Thermal Analysis and Calorimetry

, Volume 63, Issue 1, pp 105–116 | Cite as

Thermal Studies on Solid Complexes of Uracil With Some Divalent Transition Metal Ions

  • H. Ólmez
  • O. Z. Yeşilel
  • H. Içbudak


The thermal behaviour of Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Pd(II) complexes of uracil was studied by TG, DTG and DTA in a dynamic nitrogen atmosphere. Two processes occur in the isolated uracil complexes: dehydration and pyrolytic decomposition. In the hydrated complexes, the first stage observed was the loss of water molecules, which was followed by decomposition of the uracil. The thermal dehydration of the complexes occurred in from one to three steps. The final decomposition products were found to be the respective metal oxides, except in the cases of the Co(II) and Pd(II) complexes, which produced metallic cobalt and palladium, respectively. The order of reaction and energy of activation for the dehydration stage were evaluated.

divalent transition metals kinetic analysis thermal analysis uracil complexes 


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  1. 1.
    J. A. Carrabine and M. Sundanalingam, Biochemistry, 10 (1971) 292.Google Scholar
  2. 2.
    A. S. Sarkar, P. Ghosh and R. K. Bandyopadhyat, Indian J. Chem., 27A (1988) 819.Google Scholar
  3. 3.
    M. Gupta and M. N. Srivastava, Polyhedron, 4 (1985) 475.Google Scholar
  4. 4.
    A. M. Bhandari, A. K. Solankiand and S. Wodhwa, J. Inorg. Nucl. Chem., 43 (1981) 2995.Google Scholar
  5. 5.
    S. Satyanarayana, M. S. Jyoti and C. A. Lincoln, Indian J. Chem., 22A (1983) 357.Google Scholar
  6. 6.
    F. Lianza, A. Albinati and B. Lippert, Inorg. Chim. Acta, 255 (1997) 313.Google Scholar
  7. 7.
    M. Goodgame and D. A. Jakubovic, Coord. Chem. Rev., 79 (1987) 97.Google Scholar
  8. 8.
    W. S. Sheldrick and D. Neumann, Inorg. Chim. Acta, 223 (1994) 131.Google Scholar
  9. 9.
    P. K. Santra, D. Das, T. K. Misra, R. Roy, C. Sinha and S. M. Peng, Polyhedron, 18 (1999) 1909.Google Scholar
  10. 10.
    M. Gupta and M. N. Srivestava, Syn. React. Inorg. Met. Org. Chem., 26 (1996) 305.Google Scholar
  11. 11.
    Y. Dohta, C. S. Browning, P. Rekonen, M. Kodako, T. Okada, K. Okamoto, R. Natale, C. Yip, D. H. Farrar and H. Okuno, Inorg. Chim. Acta, 263 (1997) 69.Google Scholar
  12. 12.
    O. Renn, B. Lippert and I. Mutikainen, Inorg. Chim. Acta, 218 (1994) 117.Google Scholar
  13. 13.
    E. Casassas, J. Inorg. Biochem., 39 (1990) 327.Google Scholar
  14. 14.
    J. J. Foil, A. Terron and D. Mulet, Inorg. Chim. Acta, 135 (1987) 197.Google Scholar
  15. 15.
    B. T. Khan and K. Annapoorna, Inorg. Chim. Acta, 171 (1990) 157.Google Scholar
  16. 16.
    M. Kodaka, H. Okuno and Y. Dohta, Reviews in Inorganic Chemistry, 19 (1999) 211.Google Scholar
  17. 17.
    E. Frieden, J. Chem. Educ., 62 (1985) 917.Google Scholar
  18. 18.
    B. T. Khan, A. Gaffuri, P. N. Rao and S. M. Zakeeruddin, Polyhedron, 6 (1987) 387.Google Scholar
  19. 19.
    M. N. Moreno-Carretero, J. M. Salas-Peregrin and A. Mata-Arjona, J. Thermal Anal., 29 (1984) 553.Google Scholar
  20. 20.
    F. Hueso-Urena and M. N. Moreno-Carretero, Thermochim. Acta, 182 (1991) 9.Google Scholar
  21. 21.
    F. Hueso-Urena, M. N. Moreno-Carretero, J. M. Salas-Peregrin and M. A. Romero-Molina, Thermochim. Acta, 177 (1991) 119.Google Scholar
  22. 22.
    F. Hueso-Urena, M. N. Moreno-Carretero and J. M. Salas-Peregrin, Thermochim. Acta, 170 (1990) 225.Google Scholar
  23. 23.
    M. Goodgame and K. W. Johns, J. Chem. Soc., Dalton Trans., 2 (1977) 1680.Google Scholar
  24. 24.
    A. Jeres, J. Thermal Anal., 26 (1983) 315.Google Scholar
  25. 25.
    E. S. Freeman and B. Carrol, J. Phys. Chem. Soc., (1953) 3192.Google Scholar
  26. 26.
    J. J. Foil and A. Jerron, Inorg. Chim. Acta, 125 (1986) 159.Google Scholar
  27. 27.
    B. Lippert, Inorg. Chem., 20 (1981) 4326.Google Scholar
  28. 28.
    O. Z. Yeşilel, Thesis, Ondokuz Mayis University, 1999.Google Scholar

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  1. 1.Department of Chemistry, Faculty of Arts and SciencesOndokuz Mayis UniversityKurupelit, SamsunTurkey

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