학술논문
Effect of the Structure of Benzo- and Dibenzocrown Ethers on Their Reaction with the Aerosil Surface.
Document Type
Article
Source
Subject
*ETHERS
*CROWN ethers
*ADSORPTION (Chemistry)
*CHEMICAL reactions
*POLYETHERS
*SURFACE chemistry
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Language
ISSN
0040-5760
Abstract
The adsorption of 4-substituted benzo- and 5,5′-disubstituted dibenzocrown ethers from benzene by aerosil A-300 was studied. The ethers included a total of 45 compounds with diphenyl oxide, diphenyl, and diphenyl sulfide fragments. Analysis of the Henry coefficients (KH) and the extent of desorption, the IR spectra of the adsorbed compounds, and the relationship between their structure and adsorption capacity indicated that all structural fragments of the crown ethers studied interact to some extent with aerosil surface fragments. The number of oxygen atoms in the polyether fragment and the size of the macrocycle are the predominant factors. A large, nonadditive increase in KH is observed in going from pentadentate to hexadentate crown ethers. [ABSTRACT FROM AUTHOR]