Vapor pressure, heat capacities, and phase transitions of tetrakis(tert-butoxy)hafnium

Vapor pressure, liquid heat capacities, and phase change enthalpies and temperatures for technologically important organometallic precursor tetrakis(tert-butoxy)hafnium are reported. The vapor pressure was measured using the static method in the temperature range from 280 to 308 K. The standard vaporization enthalpy was derived from the temperature dependence of vapor pressure data. The liquid heat capacities were determined by Calvet calorimetry in the temperature range from 294 to 350 K. The enthalpy and temperature of fusion were measured by differential scanning calorimetry. The present study significantly extends and updates the information on physico-chemical properties for this material.

► Physico-chemical properties of tetrakis(tert-butoxy)hafnium were studied.
► Vapor pressure was determined by static method.
► Liquid heat capacities were measured by Calvet calorimetry.
► Temperature and enthalpy of fusion were determined by DSC.
► Enthalpy of vaporization was calculated from vapor pressure data.