Related Products of 22929-52-8, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.22929-52-8, Name is Dihydrofuran-3(2H)-one, molecular formula is C4H6O2. In a article£¬once mentioned of 22929-52-8
Lactone enols are stable in the gas phase but highly unstable in solution
2-Hydroxyoxol-2-ene (C5-1), the enol tautomer of gamma-butyrolactone, was generated in the gas phase as the first representative of the hitherto elusive class of lactone enols and shown by neutralization-reionization mass spectrometry to be remarkably stable as an isolated species. Ab initio calculations by QCISD(T)/6-311+G(3df,2p) provided the enthalpies of formation, proton affinities, and gas-phase basicities for gaseous lactone enols with four- (C4-1), five- (C5-1), and six-membered rings (C6-1). The acid-base properties of C4-C6 lactones and enols and reference carboxylic acid enols CH2=C(OH)2 (3) and CH2=C(OH)OCH3 (4) were also calculated in aqueous solution. The C4-C6 lactone enols show gas-phase proton affinities in the range of 933-944 kJ mol-1 and acidities in the range of 1401-1458 kJ mol-1. In aqueous solution, the lactone enols are 15-20 orders of magnitude more acidic than the corresponding lactones, with enol pKa values increasing from 5.6 (C4-1) to 14.5 (C6-1). Lactone enols are moderately weak bases in water with pKBH in the range of 3.9-8.1, whereas the lactones are extremely weak bases of pKBH in the range of -10.5 to -17.4. The acid-base properties of lactone enols point to their high reactivity in protic solvents and explain why no lactone enols have been detected thus far in solution studies.
A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 22929-52-8
Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem