Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 63: Issue 3
Transition Metal Complexes with Pyrazole-based Ligands. Part 8. Characterization and thermal decomposition of zinc(II) complexes with di- and trisubstituted pyrazoles
Authors:
K. Mészáros Szécsényi University of Novi Sad Faculty of Sciences, Institute of Chemistry 21000 Novi Sad Trg D. Obradovića 3 Yugoslavia 21000 Novi Sad Trg D. Obradovića 3 Yugoslavia

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V. Leovac University of Novi Sad Faculty of Sciences, Institute of Chemistry 21000 Novi Sad Trg D. Obradovića 3 Yugoslavia 21000 Novi Sad Trg D. Obradovića 3 Yugoslavia

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Ž. Jaćimović Faculty of Metallurgy and Technology Podgorica Yugoslavia Podgorica Yugoslavia

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V. Češljević University of Novi Sad Faculty of Sciences, Institute of Chemistry 21000 Novi Sad Trg D. Obradovića 3 Yugoslavia 21000 Novi Sad Trg D. Obradovića 3 Yugoslavia

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A. Kovács Technical University of Budapest Research Group for Technical Analytical Chemistry of the Hungarian Academy of Sciences at the Institute for General and Analytical Chemistry H-1521 Budapest Hungary H-1521 Budapest Hungary

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G. Pokol Technical University of Budapest Institute for General and Analytical Chemistry H-1521 Budapest Hungary H-1521 Budapest Hungary

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S. Gál Technical University of Budapest Institute for General and Analytical Chemistry H-1521 Budapest Hungary H-1521 Budapest Hungary

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Pages:
723–732
Online Publication Date:
16 Aug 2006
Publication Date:
01 Mar 2001
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1010135903480
Keywords:
4-acetyl-3-amino-5-methylpyrazole; 3-amino-5-methylpyrazole; 3-amino-5-phenylpyrazole; FT-IR spectroscopy; thermal decomposition; zinc(II) complexes
Restricted access

Abstract  

We report the synthesis and the characterization (elemental analysis, FT-IR spectroscopy, thermal methods and molar conductivity measurements) of the mixed complexes of zinc with acetate and 3-amino-5-methylpyrazole, HL1, [Zn(OAc)2(HL1)2], or 3-amino-5-phenylpyrazole, HL2 [Zn(OAc)2(HL2)2], or 4-acetyl-3-amino-5-methylpyrazole, HL3, [Zn(OAc)(L3)(HL3)]2, with isothiocyanate and HL2 [Zn(SCN)2(HL2)2], or HL3 [Zn(SCN)2(HL3)2], and with nitrate, isothiocyanate and 3,5-dimethyl-1-carboxamidinepyrazole, HL4 [Zn(NO3)(NCS)(HL4)2]. The thermal decomposition of the complexes is generally continuous resulting zinc oxide as end product,except [Zn(OAc)(L3)(HL3)]2 in which case a well-defined intermediate was observed between 570–620 K. On the basis of the IR spectra and elemental analysis data of the intermediate a decomposition scheme is proposed.

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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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