Vaporization thermodynamics of normal alkyl benzoates

• Published in: Journal of thermal analysis and calorimetry Vol. 147; no. 24; pp. 14631 - 14647
• Main Authors: Notfullin, Airat A., Bolmatenkov, Dmitrii N., Yagofarov, Mikhail I., Balakhontsev, Ilya S., Ziganshin, Marat A., Solomonov, Boris N.
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-12-2022; Springer; Springer Nature B.V
• Subjects: Analytical Chemistry; Benzoates; Chemistry; Chemistry and Materials Science; Empirical analysis; Enthalpy; Homology; Inorganic Chemistry; Measurement Science and Instrumentation; Physical Chemistry; Polymer Sciences; Thermodynamics; Vapor pressure; Vaporization; Volatile compounds; Benzoates; Vapor pressure; Vaporization enthalpy; Homologous series; Esters; Vaporization thermodynamics; Boiling temperature
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-022-11643-7

The compounds of the homologous series of
n-
alkyl benzoates (PhCOO-
n
-C
n
H
2n+1
) have a number of important applications. As for many low-volatile compounds, a few data on the vaporization thermodynamics of this class of compounds are available. Here we systemized and critically analyzed the available information on vapor pressures and vaporization enthalpies of short linear alkyl benzoates from methyl to pentyl and complemented these data by additional experimental investigation of long-chained compounds: the heat capacities and vapor pressures of pentadecyl, hexadecyl and heptadecyl benzoates were measured for the first time between 340 and 490 K using DSC and TG-FSC. Based on the experimental data and empirical approaches, we completely described the vaporization thermodynamics of a series of alkyl benzoates from methyl to eicosyl and established the correlation of some properties with the chain length. A way to predict the vaporization enthalpies and vapor pressures inside the homologous series in a wide temperature range was proposed and tested.