Abstract
The enthalpies of combustion and formation of 1,4-dioxane-2,6-dione were determined by combustion calorimetry. The transpiration method was used to obtain the temperature dependence of compound vapor pressures and the enthalpies of sublimation and vaporization. Differential scanning calorimetry was used to measure the enthalpy of fusion. Quantum-chemical calculations of the geometric, vibrational, and energy characteristics of the compound were performed, and the enthalpy of formation of the compound in the gas phase was estimated. Statistical thermodynamics methods were used to determine the thermodynamic properties of the compound in the ideal gas state over the temperature range 0–1500 K. Strain energies of some representatives of six-membered cyclic compounds were estimated.
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