Reference of 33100-27-5, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane, molecular formula is C10H20O5. In a Article，once mentioned of 33100-27-5
Sodium-23 and carbon-13 NMR were used to study sodium ion complexes with crown ethers 15C5, B15C5, and 18C6 as well cryptands C211, C221, C222, and C222B in water and in a number of nonaqueous solvents.The stabilities of the complexes varied in the order Na+*18C6 > Na+*15C5 > Na+*B15C5.In most cases the cationic exchange between the free and complexed sites was rapid.However, in the NaBPh4 – 18C6 – THF and NaBPh4 – 18C6 – dioxolane systems the exchange was slow enough to observe two 23Na resonances in solutions containing an excess of the sodium salt.Two signals merged when NaBPh4 was replaced by NaClO4 or NaI.In all solvents studied the four cryptands formed stable complexes with the sodium ion.The limiting chemical shifts showed some solvent dependence in the 30 to -70 deg C temperature range.The chemical shift of the complexed sodium ion moved downfield in the order Na+*C222 < Na+*C222B < Na+*C221 < Na+*C211. 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 33100-27-5 is helpful to your research., Reference of 33100-27-5