The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5-Methylfuran-2(3H)-one( cas:591-12-8 ) is researched.Category: pyrimidines.Dohnal, Vladimir; Rehak, Karel; Moravek, Pavel published the article 《Thermal and Volumetric Properties of Five Lactones at Infinite Dilution in Water》 about this compound( cas:591-12-8 ) in Journal of Chemical & Engineering Data. Keywords: thermal volumetric property lactone infinite dilution water. Let’s learn more about this compound (cas:591-12-8).
Mixing enthalpies and densities of highly dilute aqueous solutions of five lactones (namely γ-butyrolactone (GBL), γ-valerolactone (GVL), α-angelica lactone (AAL), γ-hexalactone (GHL), and δ-hexalactone (DHL)) were measured as a function of solution composition at several temperatures in the range from (288.15 to 318.15) K using a tandem flow arrangement of isothermal mixing microcalorimeter and vibrating-tube densimeter. The densities of the neat lactones were measured, also. The dissolution of the lactones in water was exothermic (except for AAL at higher temperatures) and accompanied by volume contraction. On the basis of these systematic measurements, reliable values of partial molar excess enthalpy, partial molar volume, and partial molar excess volume of the studied solutes at infinite dilution in water were determined Precision of our measurements allowed us to evaluate with a good accuracy also resp. temperature derivative properties, i.e., infinite dilution partial molar excess heat capacity, expansion, and excess expansion. The observed thermodn. behavior was governed by hydrogen bonding of water mols. to the oxygen atoms of the lactone group. Several structural effects like those of the alkylation of lactone ring, its enlargement, the introduction of the double bond, and the lactone mol. volume on the determined properties were identified and rationalized on the mol. level.
There is still a lot of research devoted to this compound(SMILES:O=C1OC(C)=CC1)Category: pyrimidines, and with the development of science, more effects of this compound(591-12-8) can be discovered.
Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia