Abstract
The retention and sorption enthalpy characteristics of 38 pentaerythritol esters of C2–C8 carboxylic acids of different structures were determined by gas-liquid chromatography on a nonpolar phase in the temperature range 433.2–563.2 K. The molecular structure was shown to affect the temperature dependence of the retention indices of the esters. The average change in the sorption enthalpy of pentaerythritol tetraesters per CH2 group is lower in magnitude than the similar contribution for normal alkanes. The excess mixing enthalpy at 298.2 K was evaluated for four fully substituted pentaerythritol esters.
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This study was financially supported by the Russian Foundation for Basic Research (project no. 19-08-00928 A).
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Translated by L. Smolina
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Emel’yanov, V.V., Krasnykh, E.L. & Portnova, S.V. Retention Indices and Sorption Enthalpies of Pentaerythritol and С2–С8 Acid Esters on Nonpolar Stationary Phases. Russ. J. Phys. Chem. 94, 2168–2176 (2020). https://doi.org/10.1134/S003602442010009X
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DOI: https://doi.org/10.1134/S003602442010009X