Skip to main content
SpringerLink
Log in

Thermal studies on metal complexes of 5-nitroso-pyrimidine derivatives

III. Thermal behaviour of Hg(II) complexes of 6-amino-5-nitrosouracil derivatives

  • Published:
Journal of thermal analysis Aims and scope Submit manuscript

Abstract

Four Hg(II) complexes, containing as ligands 6-amino-5-nitrosouracil (AH), 6-amino-3-methyl-5-nitrosouracil (BH) or 6-amino-1-methyl-5-nitrosouracil (CH), have been synthesized and their thermal behaviour studied by TG and DSC techniques: Hg3Cl6(AH)4, HgCl2(BH)2· 2 H2O, HgCl2(BH)2 · H2O and HgC2· 2 H2O.

The dehydration processes take place in only one step, with enthalpies in the range 40.2–60.0 kJ · mole−1 H2O.

Pyrolytic processes start between 200 and 250°, in all cases the thermal stability of the corresponding pyrimidine derivative being lower than that of the free ligand. These processes finish between 600 and 750°, with no residue.

Zusammenfassung

Vier 6-Amino-5-nitrosouracil (AH), 6-Amino-3-methyl-nitrosouracil (BH) oder 6-Amino-1-methyl-5-nitrosouracil (CH) als Liganden enthaltende Hg(II)-Komplexe wurden synthetisiert: Hg3Cl6(AH)4, HgCl2(BH)2 · 2 H2O, HgCl2(BH)2 · H2O und HgC2 · 2 H2O. Die Dehydratisierungsprozesse verlaufen in nur einem Schritt mit Enthalpien im Bereich von 40.2–60.0 kJ pro mol H2O. Pyrolitische Prozesse setzen zwischen 200 und 250° ein. In allen Fällen ist die thermische Stabilität der entsprechenden Pyrimidin-Derivate geringer als die der freien Liganden. Diese Prozesse sind zwischen 600 und 750° beendet, wobei kein Rückstand zurückbleibt.

Резюме

Методами ТГ и ДСК изуч ено термическое поведение синтезиро ванных комплексов двухвалентной ртути состава Нg3Сl6(АН)4, НgСl2(В Н)2 · 2 Н2O, НgСl2(ВН)2 · Н2O, и НgС2 · 2 Н2О, где АН — 6-амин о-5-нитрозоурацил, ВН — 6-амино-3-метилнитрозоу рацил и СН — депротонирован ный 6-амино-метил-5-нитр озоурацил. Процессы дегидратац ии протекают в одну стадию с энталь пией, находящейся в об ласти значений 40.2–60.0 кДж · моль−1 Н2О. Пиролитические п роцессы начинаются м ежду 200 и 250° и заканчиваются в инте рвале температур 600–750° без об разования какого-либ о остатка. Во всех случаях терми ческая устойчивость соотве тствующего комплекс а была ниже, чем свободного лиган да.

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

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. D. J. Hodgson, Progr. Inorg. Chem., 23 (1977) 211.

    Google Scholar 

  2. L. G. Marzilli, Progr. Inorg. Chem., 23 (1977) 255.

    Google Scholar 

  3. D. M. L. Goodgame and G. A. Leach, J. Chem. Soc. Dalton, (1978) 1705.

  4. D. M. L. Goodgame and G. A. Leach, Inorg. Chim. Acta, 32 (1979) 69.

    Google Scholar 

  5. R. Battistuzzi and G. Peyronel, Spectro-chim. Acta, 36A (1980) 113.

    Google Scholar 

  6. P. Lumme, P. Kekarainen, H. Knuuttila, T. Kurkirinne, M. Latvala, L. Ronkonharfu and S. Salonen, Finn. Chem. Lett., (1981) 25.

  7. N. Soha and D. Mukherfee, Polyhedron, 2 (1983) 47.

    Google Scholar 

  8. J. M. Salas-Peregrín, M. N. Moreno-Carretero, M. A. Romero-Molina and E. Colacio-Rodriguez, Rev. Chim. Min., 21 (1984) 233.

    Google Scholar 

  9. A. I. Stetsenko, E. S. Dimitriyeva and K. I. Yakoulev, J. Clin. Hematol. Oncol., 7 (1977) 522.

    Google Scholar 

  10. B. Rosenberg, Cancer Chemother. Rep. 59 (1975) 589.

    PubMed  Google Scholar 

  11. P. C. Kong and F. D. Rochon, Can. J. Chem. 57 (1979) 516.

    Google Scholar 

  12. W. Stillwell and H. C. Winter, Biochem. Biophys. Res. Commun. 56 (1974) 617.

    PubMed  Google Scholar 

  13. J. S. García-Mino, J. D. López-González, M. M. Moreno-Carretero and J. M. Salas-Peregrín, An. Quim., 77B (1981) 335.

    Google Scholar 

  14. J. M. Salas-Peregrín, M. N. Moreno-Carretero, J. D. López-González and C. Valenzuela-Calahorro, J. Thermal Anal., 26 (1983) 251.

    Google Scholar 

  15. M. N. Moreno-Carretero and J. M. Salas-Peregrín, J. Thermal Anal., 29 (1984) 553. Anal., 29 (1984) 553.

    Google Scholar 

  16. M. N. Moreno-Carretero and J. M. Salas-Peregrín, J. Thermal Anal., 29 (1984) 1053.

    Google Scholar 

  17. C. Rodriguez-Melgarejo, Thesis, University of Granada, 1979.

  18. M. N. Moreno-Carretero, Thesis, University of Granada, 1983.

  19. R. Battistuzzi and G. Peyronel, Polyhedron, 2 (6) (1983) 471.

    Google Scholar 

  20. A. Blazek, Thermal Analysis, Van Nostrand Reinhold Company, London, 1973, p. 171.

    Google Scholar 

  21. R. C. Mackenzie, Differential Thermal Analysis, Vol. 1, Academic Press, London, 1970, p. 345.

    Google Scholar 

  22. M. I. Pope and M. D. Judd, Differential Thermal Analysis, Heyden, London, 1977, p. 49.

  23. Handbook of Chemistry and Physics, 59rd Edition, C. R. C. Press, U. S. A. 1979.

Download references

Author information

Authors and Affiliations

  1. Department of Inorganic Chemistry, University College, Jaen, Spain

    M. N. Moreno-Carretero & J. M. Salas-Peregrín

  2. Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Granada, Spain

    J. M. Salas-Peregrín

Authors
  1. M. N. Moreno-Carretero
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J. M. Salas-Peregrín
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Moreno-Carretero, M.N., Salas-Peregrín, J.M. Thermal studies on metal complexes of 5-nitroso-pyrimidine derivatives. Journal of Thermal Analysis 30, 377–382 (1985). https://doi.org/10.1007/BF02156503

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02156503

Keywords

Search

Navigation