The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane, molecular formula is C10H20O5. In a Article£¬once mentioned of 33100-27-5, Safety of 1,4,7,10,13-Pentaoxacyclopentadecane
Tuning binding of rubidium ions to planar and curved negatively charged pi surfaces
Two new rubidium salts of the bowl-shaped corannulene monoanion radical C20H10?- (1?-), [Rb(15-crown-5)2+][C20H10 -] (2) and [Rb(dicyclohexano-18-crown-6)+][C 20H10-] (3), have been synthesized and structurally characterized in this work. An excess of 15-crown-5 ether provided full encapsulation of the rubidium ion in [Rb(15-crown-5)2] +, which precluded metal-directed pi interactions with the anionic surface of C20H10?- in the solid-state structure of 2. The use of more sterically demanding dicyclohexano-18-crown-6 ether prevented the formation of polymeric chains previously seen with 18-crown-6 ether and favored the isolation of the discrete contact ion pair 3. Complex 3 is built on a convex eta6 coordination of Rb+ to C20H10?-, reaffirming the exo-binding preference of rubidium ions toward the singly charged corannulene bowl. A rubidium salt of the planar coronene monoanion radical C24H 12?- (4?-), [Rb(18-crown-6) +][C24H12-] (5), has also been prepared and structurally characterized to reveal a new binding mode of C 24H12?-. The analysis of the X-ray structure of 5, augmented by DFT calculations, confirmed the existence of strong C-H…pi interactions between the crown ether and charged surface of C24H12?-. These interactions result in a good alignment of matching in size crown ether and coronene moieties, thereby being responsible for the formation of a hub-bound coronene product. DFT calculations were also used to follow the spin density distribution in the [Rb(18-crown-6)][C24H12] system as well as in original fragments.
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 33100-27-5 is helpful to your research., Safety of 1,4,7,10,13-Pentaoxacyclopentadecane
Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare