Thermal Properties of Cobalt(II) β-Iminoketonates

Thermogravimetry, differential scanning calorimetry, and flow methods were used to investigate thermal properties of a series of cobalt(II) β-iminoketonates [R 2 C(NR 1 )CHC(O)R 2 ]. The consecutive order of their volatility was determined. The complexes do not decompose up to melting and do not und...

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Bibliographic Details
Published in:Russian journal of general chemistry 2021-10, Vol.91 (10), p.1977-1983
Main Authors: Dorovskikh, S. I., Stabnikov, P. А., Zelenina, L. N., Sysoev, S. V., Morozova, N. B.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Phase transitions
Sublimation
Temperature dependence
Thermodynamic properties
Thermogravimetry
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Summary:Thermogravimetry, differential scanning calorimetry, and flow methods were used to investigate thermal properties of a series of cobalt(II) β-iminoketonates [R 2 C(NR 1 )CHC(O)R 2 ]. The consecutive order of their volatility was determined. The complexes do not decompose up to melting and do not undergo phase transitions. For the complex (R 1 = Н, R 2 = Me) the temperature dependence of sublimation ln ( p / p 0 ) = 32.02 ‒ 16822/ T (K) at 402.6‒433.7 K was measured and the values of Δ subl H ° Т * = 140±4 kJ/mol and Δ subl S ° Т * = 266±10 J/(K·mol) were calculated.
ISSN:1070-3632
1608-3350
DOI:10.1134/S107036322110008X