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A thermal behaviour and structural study of bis(hydroxamato)oxovanadium(IV) complexes

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Abstract

The bis(hydroxamato)oxovanadium(IV) complexes of composition [VO(IAH)2)] (I), [VO(IBH)2)] (II) and [VO(ICH)2)] (III) (where IAH = indole-3-acetohydroxamate; (C9H8NCONHO−); IBH = indole-3-butyrohydroxamate; (C11H12NCONHO−); ICH = indole-2-carbohydroxamate; (C8H6NCONHO−)) synthesized form the reactions of VOSO4·5H2O with bi-molar amounts of potassium salts of the respective hydroxamic acids in methanol have been characterised by elemental analyses, magnetic moment measurements and IR spectral studies. The thermal behaviour of complexes has been studied by TG and DTA techniques. Thermograms indicated that all complexes decompose in two steps yielding [VO(IAH)], [VO(IBH)] and [VO(ICH)] as intermediate of respective complexes and VO2 as the final product of decomposition in each case. From the initial decomposition temperatures (IDT), the order of thermal stability for the complexes has been inferred as II > I > III.

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Acknowledgements

This article is dedicated to the fond memory of our worthy teacher Late Prof. K·C. Malhotra, Former Vice-Chancellor Himachal Pradesh University, Shimla. Reena Sharma is thankful to University Grant Commission, New Delhi for providing financial support in the form of Major Research Project F. No.33-295/2007 (SR) dated 28.02.2008.

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

    Reena Sharma & Neeraj Sharma

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  1. Reena Sharma
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  2. Neeraj Sharma
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Correspondence to Neeraj Sharma.

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Sharma, R., Sharma, N. A thermal behaviour and structural study of bis(hydroxamato)oxovanadium(IV) complexes. J Therm Anal Calorim 112, 25–30 (2013). https://doi.org/10.1007/s10973-012-2777-5

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