Skip to main content
SpringerLink
Log in

Thermal Studies on Ionic Derivatives of Hafnium(IV) Involving Maltol Ligand

  • Published:
Journal of Thermal Analysis and Calorimetry Aims and scope Submit manuscript

Abstract

A number of ionic chelate complexes of maltol(A) and hafnium(IV) the type[(η5−C5H5)2HfL]+[MCl3]− (B) [HL=maltol; M=Zn(II), Cd(II), Hg(II), Cu(II)]have been synthesized and characterized by spectral studies (IR, UV, 1H NMR and 13C NMR). The stoichiometry of the complexes has been confirmed by conductance measurements. Thermogravimetric (TG) and differential thermal analytical (DTA) studies have been carried out for these complexes and from TG curves, the order, apparent activation energy and apparent activation entropy of the thermal decomposition reactions have been elucidated .The order in each case has been determined to be one and the degree of spontaneity and lability have been inferred from the apparent activation energy and entropy, respectively. Thermal parameters have been correlated with some structural aspects of the complexes concerned. From differential thermal analysis curves, the heat of reaction has been calculated.

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. W. W. Wendlandt, Thermal Methods of Analysis, John Wiley, 3rd Ed., New York 1986, Chap. IV and VII.

  2. S. Dey, G. S. Sodhi and N. K. Kaushik, Transition Met. Chem., 11 (1986) 371.

    Article  CAS  Google Scholar 

  3. S. Kamrah, G. S. Sodhi and N. K. Kaushik, Thermochim. Acta, 98 (1986) 191.

    Article  CAS  Google Scholar 

  4. S. Bhatia, N. K. Kaushik and G. S. Sodhi, Indian J. Chem., 26A (1987) 433.

    CAS  Google Scholar 

  5. J. Kaur and G. S. Sodhi, J. Therm. Anal. Cal., 65 (2001) 249.

    Article  CAS  Google Scholar 

  6. S. S. Marwaha, J. Kaur and G. S. Sodhi, J. Inorg. Biochem., 54 (1994) 67.

    Article  CAS  Google Scholar 

  7. R. C. Agarwal, S. P. Gupta and R. K. Rastogi, J. Inorg. Nucl. Chem., 36 (1974) 208.

    Article  CAS  Google Scholar 

  8. N. K. Dutt and U. U. M. Sarma, J. Inorg. Nucl. Chem., 37 (1975) 1801.

    Article  CAS  Google Scholar 

  9. S. Bhatia, N. K. Kaushik and G. S. Sodhi, J. Coord. Chem., 16A (1987) 311.

    Google Scholar 

  10. H. C. Smitherman and L. N. Ferguson, Tetrahedron, 24 (1968) 923.

    Article  CAS  Google Scholar 

  11. P. C. Wailes, H. Weigold and A. P. Bell, J. Organomet. Chem., 33 (1971) 181.

    Article  CAS  Google Scholar 

  12. E. Samuel, Bull. Soc. Chim. Fr., (1966) 3548.

  13. C. A. Kingsbury, M. Cliffton and J. H Looker, J. Org. Chem., 41 (1976) 2777.

    Article  CAS  Google Scholar 

  14. K. Samby, J. Kaur, G. Singh and G. S. Sodhi, Indian J. Chem., 37A (1998) 355.

    CAS  Google Scholar 

  15. A. W. Coats and J. P. Redfern, Nature (London), (1964) 68.

  16. J. Zsakó, J. Phys. Chem., 72 (1968) 2406.

    Article  Google Scholar 

  17. W. E. Collins, in Analytical Calorimetry, R. S. Porter and J. M. Johnson, Vol. 2, Eds., Plenum, New York 1970, p. 353.

    Google Scholar 

  18. B. R. Curell, in Thermal Analysis, R. F. Schwenker and P. D. Garn, Vol. 2, Eds., Academic Press, New York 1969, p. 1185.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Chemistry, Delhi University, Delhi, 110007, India

    E. Malhotra & N. K. Kaushik

  2. Department of Chemistry, S. G. T. B. Khalsa College (University of Delhi), Delhi, 110007, India

    G. S. Sodhi

Authors
  1. E. Malhotra
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. N. K. Kaushik
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. G. S. Sodhi
    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

Malhotra, E., Kaushik, N.K. & Sodhi, G.S. Thermal Studies on Ionic Derivatives of Hafnium(IV) Involving Maltol Ligand. Journal of Thermal Analysis and Calorimetry 68, 215–222 (2002). https://doi.org/10.1023/A:1014965517463

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/A:1014965517463

Search

Navigation