Energetic characterization of uracil derivatives: Orotic and isoorotic acids

摘要

The standard (p degrees =0.1 MPa) molar enthalpies of formation of orotic and isoorotic acids, in the crystalline phase, were derived from the respective standard massic energies of combustion measured by static bomb combustion calorimetry, in oxygen, at T = 298.15 K, as -821.7 +/- 1.1 kJ mol(-1) and -838.3 +/- 1.9 kJ mol(-1), respectively.