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Thermonanalytical Investigations of Monochlorobis (2,4-Pentanedionato) Vanadium(IV) Aryloxides

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Abstract

The thermal decomposition of the complexes [Vcl (acac)2(OAr)] (where acac=2,4-pentanedionato anion; OAr=–OC6H4O-M-4, OC6H4OBut-4) has been studied using non-isothermal techniques (DTA and TG). The TGA indicate that the substitution of chlorine in VCl2(acac)2 with aryloxide ligands results in an increase in the initial temperature of decomposition (IDT) of the new complexes. The role of the substituent at the aryloxide ring on the thermal stability of the complexes is depicted and hence described. The ultimate decomposition product in all the complexes has been identified as V2O5. The kinetic and thermodynamic parameters namely, the energy of activation E, the frequency factor A, entropy of activation S and specific reaction rate constant k r etc. have been rationalized in relation to the bonding aspect of the aryloxide ligands.

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Authors and Affiliations

  1. Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla, 171005, India

    N. Sharma, A. K. Sood, S. S. Bhatt & S. C. Chaudhry

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  1. N. Sharma
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  2. A. K. Sood
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  3. S. S. Bhatt
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  4. S. C. Chaudhry
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Sharma, N., Sood, A.K., Bhatt, S.S. et al. Thermonanalytical Investigations of Monochlorobis (2,4-Pentanedionato) Vanadium(IV) Aryloxides. Journal of Thermal Analysis and Calorimetry 61, 779–785 (2000). https://doi.org/10.1023/A:1010188913186

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