Effect of the Structure of Benzo- and Dibenzocrown Ethers on Their Reaction with the Aerosil Surface |
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Authors: | O V Zakolodyazhnaya L V Litvinova N S Kraevskaya S A Kotlyar G L Kamalov |
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Institution: | (1) A. V. Bogatskii Physico-Chemical Institute, National Academy of Sciences of Ukraine, 86 Lustdorfs'ka Doroga, 65080 Odesa, Ukraine |
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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.
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Translated from Teoreticheskaya i Eksperimental'naya Khimiya, Vol. 41, No. 4, pp. 247–251, July–August, 2005. |
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Keywords: | aerosil adsorption benzo- and dibenzocrown ethers Henry coefficient surface |
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