The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.14187-32-7, Name is Dibenzo-18-crown-6, molecular formula is C20H24O6. In a Article£¬once mentioned of 14187-32-7, Application In Synthesis of Dibenzo-18-crown-6
Stabilities in water of alkali metal ion complexes with dibenzo-24-crown-8 and dibenzo-18-crown-6 and their transfer activity coefficients from water to nonaqueous solvents
Stability constants KML for the 1:1 complexes of Na +, K+, Rb+, and Cs+ with dibenzo-24-crown-8 (DB24C8) and dibenzo-18-crown-6 (DB18C6) in water have been determined by a capillary electrophoretic technique at 25C. The K ML sequence is Na+ < K+ < Rb+ < Cs+ for DB24C8 and Na+ < K+ > Rb+ > Cs+ for DB18C6. Compared with DB18C6, DB24C8 exhibits higher selectivity for K+ over Na+, but lower selectivity for K+, Rb+, and Cs+. To evaluate the solvation of the complexes in water, their transfer activity coefficients sgamma H2O between polar nonaqueous solvents and water have been calculated. The sgamma H2O values provide the following information: interactions with water of the metal ions and of the crown-ether oxygens are greatly reduced upon complexation and the complexes undergo hydrophobic hydration in water; the character of each alkali metal ion in solvation is more effectively masked by DB24C8 than by DB18C6, because of the larger and more flexible ring structure of DB24C8. Solvent effects on the complex stabilities are discussed on the basis of the sgamma H 2O values.
The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 14187-32-7 is helpful to your research., Application In Synthesis of Dibenzo-18-crown-6
Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare