Saturation vapor pressure of the mixed-ligand calcium bis(hexafluoroacetylacetonate) complex with dyglime and water

Abstract

The vapor composition and thermodynamic characteristics of vaporization of the mixed-ligand complex Ca(hfa)2(diglyme)(H2O) (I) (hfa− is the hexafluoroacetylacetonate anion, diglyme is 1-methoxy-2-(2-methoxyethoxy)ethane) in the temperature range of 298–350 K were studied by the Knudsen effusion method with mass-spectrometric analysis of the gas phase. The mass spectrometry data were juxtaposed with the results of thermal analysis. It was shown that dehydration of I, resulting in a change of the intermolecular bonding system, affects the thermodynamic parameters of sublimation under conditions where dehydration and sublimation occur in parallel.