In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1679-47-6, name is 3-Methyldihydrofuran-2(3H)-one, introducing its new discovery. HPLC of Formula: C5H8O2
Each of a series of C5H8O2 isomeric carboxylic acids and lactones (1-9) was protonated in both concentrated sulfuric acid and trifluoromethanesulfonic acid.The thermally induced transformations of the protonated species were then studied over the temperature range -40 to +160 deg C.As a general rule, all the initially generated cations were eventually converted to protonated gamma-valerolactone (1HO+) and, finally, to protonated cyclopentenone (10HO+).The cations derived from the cyclopropanecarboxylic acids 7 and 8 both underwent ring opening to the unsaturated cation 6HO+, which then rearranged to a protonated alpha-lactone.In concentrated sulfuric acid the latter species loses carbon monoxide to afford protonated 2-butanone 11HO+.The CIMS spectra of compounds 1-9 were recorded, allowing a correlation between the fragmentation routes in the gas phase and the transformations observed in solution.In this way, the data obtained in strong acids are used to assign reasonable structures to the gas-phase ions.
Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 1679-47-6. HPLC of Formula: C5H8O2
Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem