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
Conformations of dibenzo-18-crown-6 (DBC), dicyclohexano-18-crown-6 (DCC) and their alkali cation complexes in the solid state and in solution have been investigated by Raman spectroscopy.The Raman spectra were analysed by using the relationships between Raman frequencies and conformations previously found for unsubstituted crown ethers.DBC takes a conformation, (tCttGttG’t)2, with gauche (G) or gauche’ (G’) CH2-CH2 bonds, trans (t) C-O bonds and cis (C) O-C-C-O linkages at the benzene rings, when it complexes with a cation in the solid state and in solution.Uncomplexed DBC adopts another conformation in the solid state, which contains both the trans and gauche conformations about the CH2-CH2 and CO bonds.In solution, uncomplexed DBC exists as a mixture of conformers including the two conformers described above.Vibrational couplings between the oxyethylene and cyclohexane rings are strong in DCC and its strength depends on the crown conformation.The cation-bound crown rings of DCC isomers A and B in solution predominantly take the same conformation, (tG’ttGt)3, found for the crystalline isomer B-NaBr complex.A metastable conformer containing trans CH2-CH2 bonding is found for the Na+ complexes of both isomers in solution.Uncomplexed DCC adopts different crown ring conformations in isomers A and B in the solid state and diverse conformational states in solution.
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