A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 14187-32-7, Name is Dibenzo-18-crown-6, molecular formula is C20H24O6. In a Article，once mentioned of 14187-32-7, Recommanded Product: 14187-32-7
This paper describes the synthesis, in ethereal solvents, the complexes of 18-crown-6, the cis-syn-cis and the cis-anti-cis isomers of dicyclohexano-18-crown-6, and dibenzo-18-crown-6 with the potassium and sodium salts of phenoxide and thiocyanate (as well as some potassium oximate salts).In general, the macrocycles break down the aggregates of the potassium salts so that the complexes of the contact ion pairs are isolated.The complex of the cis-anti-cis isomer of dicyclohexano-18-crown-6, howewer, which has a low stability constant, complexes the dimer of potassium phenoxide to give a complex with a 1:2 host guest ratio.This appears to be the first example of a 1:2 host:guest ratio of potassium salt with an 18-crown-6 macrocycle.There is a greater tendency for the complexes of sodium salts to have a host:guest ratios less than 1:1.Thus, 18-crown-6 gives complexes with sodium phenoxide and sodium thiocyanate which have 1:3 and 1:2 host:guest ratios, respectively.Host:guest ratios of 1:2 are also obtained for the two above-mentioned isomers of dicyclohexano-18-crown-6 and for dibenzo-18-crown-6 with sodium phenoxide.Sodium thiocyanate gives complexes with either 1:1 or 1:2 host:guest ratios depending on the macrocycle.With dibenzo-18-crown-6, sodium thiocyanate gives a 1:1 complex in which one molecule of the solvent used is incorporated into the complex.The infrared and ultraviolet spectra of the complexes are discussed.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Recommanded Product: 14187-32-7. In my other articles, you can also check out more blogs about 14187-32-7