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Comprehensive thermochemical study of sublimation, melting and vaporization of scandium(III) beta-diketonates Full article

Journal Thermochimica Acta
ISSN: 0040-6031 , E-ISSN: 1872-762X
Output data Year: 2020, Volume: 689, Article number : 178639, Pages count : 9 DOI: 10.1016/j.tca.2020.178639
Tags Scandium beta-diketonates DSC Static and effusion methods Thermodynamic characteristics Melting and evaporation processes
Authors Zelenina Ludmila N. 1 , Zherikova Kseniya V. 1 , Chusova Tamara P. 1 , Trubin Sergey V. 1 , Bredikhin Roman A. 2 , Gelfond Nikolay V. 1 , Morozova Natalia B. 1
Affiliations
1 Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences
2 Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Science

Abstract: The pressure of saturated and unsaturated vapor over solid and liquid scandium(III) complexes with acet-ylacetone Sc(acac)3, trifluoroacetylacetone Sc(tfac)3, and hexafluoroacetylacetone Sc(hfac)3 has been measured using a static method with glass membrane-gauge manometers and Knudsen effusion method with mass spec-trometric gas phase monitoring. The temperatures and enthalpies of melting were measured for these com-pounds by differential scanning calorimetry. As a result of this study the thermal stabilities of investigatedcomplexes were established, the temperature dependences of saturated vapor pressure were obtained, the thermodynamic characteristics of processes under study (ΔprH°T, ΔprS°T) were calculated. Thermal properties of these compounds were compared with literature data.
Cite: Zelenina L.N. , Zherikova K.V. , Chusova T.P. , Trubin S.V. , Bredikhin R.A. , Gelfond N.V. , Morozova N.B.
Comprehensive thermochemical study of sublimation, melting and vaporization of scandium(III) beta-diketonates
Thermochimica Acta. 2020. V.689. 178639 :1-9. DOI: 10.1016/j.tca.2020.178639 WOS Scopus РИНЦ
Dates:
Submitted: Oct 30, 2019
Accepted: May 1, 2020
Published online: May 11, 2020
Published print: Jul 1, 2020
Identifiers:
Web of science WOS:000540733500004
Scopus 2-s2.0-85085247671
Elibrary 43292798
OpenAlex W3023325898
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