Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 107: Issue 1
Thermoanalytical investigations of niobium(V) complexes of 4-isopropylphenol
Authors:
Neeraj Sharma Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla 171005, India

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Amit Pathania Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla 171005, India

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Mala Sharma Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla 171005, India

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Pages:
149–154
Online Publication Date:
23 Jun 2011
Publication Date:
01 Jan 2012
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-011-1709-0
Keywords:
Niobium (V) complexes; 4-Isopropylphenol; TG and DTA; Kinetic and thermodynamic parameters; Coats–Redfern equation
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Abstract

Thermal behaviour of newly synthesized niobium(V) aryloxides of composition [NbCl5−n(OC6H4CH(CH3)2-4)n] (where n = 1 → 5) synthesized by the reactions of niobium pentachloride with 4-isopropylphenol in predetermined molar ratios in carbon tetrachloride has been studied by thermogravimetric (TG) and differential thermal analysis (DTA) techniques. The results showed that thermal decomposition of complex of composition [NbCl4(OC6H4CH(CH3)2-4)] resulted in the formation of NbOCl3 as the ultimate decompositional product while all other complexes yielded Nb2O5 as the final product of thermal decomposition. From the mathematical analysis of TG data, the kinetic and thermodynamic parameters viz. energy of activation, frequency factor, entropy of activation, etc. have been evaluated using Coats–Redfern equation.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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