Study of temperature dependencies of saturated vapor pressure of ruthenium(III) beta-diketonate derivatives

Complexes of ruthenium(III) with the following beta-diketones: 2,4-pentanedione (Ru(acac)(3)), 1,1,1-trifluoro-2,4-pentanedione (Ru(tfac)(3)), 2,2,6,6-tetramethyl-3, 5-heptanedione (Ru(thd)(3)), 2,2,6,6-tetramethyl-4-fluoro-3,5-heptanedione (Ru(tfhd)(3)) and 1,1,1-trifluoro-5,5-dimethyl-2,4-hexanedione (Ru(ptac)(3)) were synthesized and identified by means of mass spectrometry. By effusion Knudsen method with mass spectrometric registration of gas phase composition the temperature dependencies of saturated vapor pressure were measured for ruthenium(III) compounds and the thermodynamic characteristics of vaporization processes enthalpy Delta H-T* and entropy Delta S-T*(o) of this complexes were determined.