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Thermal properties of hafnium(IV) and zirconium(IV) β-diketonates

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Abstract

Five volatile hafnium(IV) and zirconium(IV) β-diketonates: hafnium(IV) acetylacetonate, hafnium(IV) trifluoroacetylacetonate, hafnium(IV) pivaloyltrifluoroacetonate, hafnium(IV) 2,2,6,6-tetramethylheptane-3,5-dionate and zirconium(IV) 2,2,6,6-tetramethylheptane-3,5-dionate were obtained, purified and identified. Thermal behavior of solid compounds was investigated by thermogravimetry (TG) and differential scanning calorimetry (DSC) in helium atmosphere and in vacuum. DSC method was also used for definition of thermodynamic characteristics of melting processes. Using the static method with quartz membrane zero-manometer and the flow method the temperature dependencies of saturated vapor pressure for hafnium(IV) complexes was obtained. The standard thermodynamic characteristics ΔH 0T and ΔS 0T of sublimation and evaporation processes were calculated from the temperature dependences of saturated vapor pressure.

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Authors and Affiliations

  1. Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, 630090, Russia

    Ksenia V. Zherikova, Natalia B. Morozova, Ludmila N. Zelenina, S. V. Sysoev, Tamara P. Chusova & I. K. Igumenov

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  1. Ksenia V. Zherikova
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  2. Natalia B. Morozova
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  3. Ludmila N. Zelenina
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  4. S. V. Sysoev
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  5. Tamara P. Chusova
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  6. I. K. Igumenov
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Correspondence to Ksenia V. Zherikova.

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Zherikova, K.V., Morozova, N.B., Zelenina, L.N. et al. Thermal properties of hafnium(IV) and zirconium(IV) β-diketonates. J Therm Anal Calorim 92, 729–734 (2008). https://doi.org/10.1007/s10973-008-9027-x

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