Volatility and thermal stability of vanadyl β-diketonate complexes

• Published in: Russian journal of inorganic chemistry Vol. 62; no. 6; pp. 818 - 821
• Main Authors: Malkerova, I. P., Makarevich, A. M., Alikhanyan, A. S., Kuz’mina, N. P.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-06-2017; Springer Nature B.V
• Subjects: Chemistry; Chemistry and Materials Science; Enthalpy; Inorganic Chemistry; Knudsen effusion; Mass spectrometry; Phase composition; Physical Methods of Investigation; Sublimation; Thermal analysis; Thermal stability; Thermodynamic properties; Volatility
• ISSN: 0036-0236; 1531-8613
• DOI: 10.1134/S0036023617060134

Thermal behavior and thermodynamic characteristics of vanadyl β-diketonates—acetylacetonate VO(acac)
2
, dipivaloylmethanate VO(thd)
2
, and tris-hexafluoroacetylacetonate VO(hfa)
2
(Hacac, 2,4-pentanedione; Hthd, 2,2,6,6-tetramethyl-3,5-heptanedione; Hhfa, 1,1,1,5,5,5-hexafluoro-2,4-pentanedione)—have been studied by thermal analysis and the Knudsen effusion mass spectrometry study of gas phase composition. The compounds have been shown to undergo congruent sublimation. Saturated vapor over the complexes has been shown to comprise monomeric VOL
2
molecules. Absolute values of partial pressures and sublimation enthalpies of these compounds have been determined.