Transition Metal Chemistry

, Volume 12, Issue 4, pp 289–291 | Cite as

Thermal decomposition of molybdenum(IV) dialkyldithiocarbamates: application of a new method to kinetic studies

  • Rafael Lozano
  • Jesūs Román
  • Juan C. Avilés
  • Amparo Moragues
  • Antonio Jerez
  • Enrique Ramos
Full Papers

Summary

We describe the application of a new method (differential scanning calorimetry, d.s.c.) to the kinetic analysis of the thermal decomposition under dinitrogen of several adducts with pyridine of MoIV dialkyldithiocarbamates. The adducts are of the form [Mo2(dtc)4(py)2] (dtc=Et2,n-Pr2,i-Pr2,t-Bu2, orN-methyl-cyclo-hexyldithiocarbamate and py). From d.s.c. curves, the activation energies for the loss of two pyridine molecules were calculated, and the mechanism was determined. A relationship between activation energies and the steric requirements of the ligands was also determined.

Keywords

Physical Chemistry Activation Energy Inorganic Chemistry Catalysis Differential Scanning Calorimetry 

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References

  1. (1).
    W. W. Wendlandt,Thermal methods of analysis, Wiley New York, 1974, p. 45.Google Scholar
  2. (2).
    A. E. Nerwkirk,Anal. Chem.,32, 1558 (1960).Google Scholar
  3. (3).
    E. S. Freeman and B. Carroll,J. Phys. Chem.,62, 394 (1958).Google Scholar
  4. (4).
    A. Jerez,J. Therm. Anal.,26, 315 (1983).Google Scholar
  5. (5).
    H. H. Horowitz and G. Metzger,Anal. Chem.,35, 1464 (1963).Google Scholar
  6. (6).
    A. W. Coats and J. P. Redfern,Nature,201, 68 (1964).Google Scholar
  7. (7).
    C. D. Doyle,J. Appl. Polymer. Sci.,5, 285 (1961).Google Scholar
  8. (8).
    T. R. Ingraham and P. Marrier,Can. J. Chem. Eng.,161, (1964).Google Scholar
  9. (9).
    B. N. N. Achar, G. W. Brindley and J. H. Sharp,Proc. Int. Clay Conf., Jerusalem,1, 67 (1966).Google Scholar
  10. (10).
    R. Lozano, A. Moragues and A. Doadrio,An. Quím, in press.Google Scholar
  11. (11).
    R. Lozano, A. Moragues and A. Doadrio,II Plenary Reunion, Grupo Especializado de Química Inorgánica de la Real Sociedad Española de Química, Baeza—Spain, (1985).Google Scholar
  12. (12).
    A. Moragues, Sc. Thesis, Madrid—Spain (1985).Google Scholar
  13. (13).
    R. Lozano, A. Moragues and J. Roman,Thermochim. Acta,108, 1 (1968).Google Scholar
  14. (14).
    J. M. Thomas and T. A. Clarke,J. Chem. Soc. (A), 457 (1968).Google Scholar
  15. (15).
    R. Lozano and J. Roman, submitted for publication inThermochim. Acta.Google Scholar
  16. (16).
    J. M. Criado, D. Dollimore and G. R. Heal,Thermochim. Acta,54, 159 (1982).Google Scholar

Copyright information

© Chapman and Hall Ltd 1987

Authors and Affiliations

  • Rafael Lozano
    • 1
  • Jesūs Román
    • 1
  • Juan C. Avilés
    • 1
  • Amparo Moragues
    • 1
  • Antonio Jerez
    • 2
  • Enrique Ramos
    • 2
  1. 1.Departamento de Química Inorgánica y Analítica, Facultad de FarmaciaUniversidad ComplutenseMadridSpain
  2. 2.Departamento de Química Inorgánica, Facultad de QuímicasUniversidad ComplutenseMadridSpain

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