Standard molar enthalpies of formation of 3-methylglutaric and 3,3-dimethylglutaric anhydrides




3-methylglutaric anhydride, 3,3-dimethylglutaric anhydride, enthalpy of formation, functional group-contribution methods


In this research, both the standard molar enthalpy of formation in the crystalline phase and in the gas phase of 3-methylglutaric anhydride was calculated from experimental data. The temperature and enthalpy of fusion, as well as the molar heat capacity in solid phase was calculated by differential scanning calorimetry; the molar enthalpy of sublimation at 298.15 K by the Knudsen effusion method, the molar enthalpy of vaporization at 298.15 K by thermogravimetric analysis, and the standard massic combustion energy by combustion adiabatic calorimetry. Since 3,3-dimethylglutaric anhydride presented crystal transitions (with endothermic points at 352.76 K, 356.98 K and 397.15 K), some of its thermochemical properties were estimated from the functional group-contribution methods proposed by Benson, Gani and Naef and from application of Machine Learning based models.


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How to Cite

M. A. García-Castro, F. Díaz-Sánchez, J. A. Galicia-Aguilar, and E. Vidal-Robles, “Standard molar enthalpies of formation of 3-methylglutaric and 3,3-dimethylglutaric anhydrides”, Rev. Mex. Fís., vol. 69, no. 5 Sep-Oct, pp. 051701 1–, Sep. 2023.



17 Thermodynamics and Statistical Physics