Synthetic Route of 14187-32-7, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 14187-32-7, Name is Dibenzo-18-crown-6, molecular formula is C20H24O6. In a Article，once mentioned of 14187-32-7
Synergistic effects in the complexation of dibenzo-18-crown-6 (Cr) with salts (A-M+)sodium 8-anilino-1-naphthalenesulfonate(NaANS) and sodium picrate (NaPi) in the presence of additives, S, were quantitatively evaluated by means of a competition method involving an immobilized, resin-bound benzo-18-crown-6 ligand, N.The reaction A-M+N+Cr<*>A-CrM++N (K) was studied in toluene by using as additives dioxane, tetrahydrofuran (THF), and acetonitrile.Formation of A-CrM+ is enhanced by S due to the reaction A-CrM++S<*>A-CrM+S (K1).For NaANS, K1 decreases in the order S=THF>dioxane>CH3CN.Experiments with NaANS and the additives hexamethylphosphoramide (HMPA), dimethyl sulfoxide (Me2SO), and dimethylformamide (DMF) in the presence of DB18C6 reveal a synergistic effect with Me2SO and DMF, but in all three systems complexes of the type A-M+S2 are formed.Studied in the absence of DB18C6, the reaction A-M+N+2S<*>A-M+S2+N (K21) yielded k21 values which decrease in the order HMPA>Me2SO>DMF.The synergistic effects in mixtures of crown ethers and other cation-binding additives, S, are favored when the cation of the ion pair A-M+ can penetrate the crown cavity sufficiently to bind the molecule S from the opposite side.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 14187-32-7 is helpful to your research., Synthetic Route of 14187-32-7