Conclusions
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1.
The energy contributions of the methylene groups of n-alkyl chains to the total free energy of solution in Apiezon L and Carbowax-1000 were evaluated by gas-liquid chromatography in the following homologous series: n-alkanes, amines, alcohols, n-alkyl formates, n-alkyl methyl ketones, and thioethers.
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2.
The calculated methylene group contribution depends on its position in the chain, once the role of the dispersion interactions has been established; the CH2 groups in the β-and γ-positions with respect to the functional group show the highest contributions.
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3.
An equation is proposed for the calculation of the contribution of each of the n-alkyl radicals in a given series of homologs to the free energy of solution.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1240–1246, June, 1983.
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Golovnya, R.V., Grigor'eva, D.N. Variation of the methylene group's contribution to the total energy of sorption as a function of its proximity to the functional group in a homologous series during chromatography. Russ Chem Bull 32, 1119–1123 (1983). https://doi.org/10.1007/BF00953139
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DOI: https://doi.org/10.1007/BF00953139