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

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