Fusion enthalpies of benzoic acid derivatives, aromatic and heteroaromatic carboxylic acids as a tool for estimation of sublimation enthalpies at 298.15 K

• Published in: Fluid phase equilibria Vol. 430; pp. 93 - 100
• Main Authors: Solomonov, Boris N., Nagrimanov, Ruslan N., Yagofarov, Mikhail I.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25-12-2016
• Subjects: Benzoic acid; Benzoic acid derivatives; Carboxylic acids; Derivatives; Enthalpy; Enthalpy of fusion; Enthalpy of sublimation; Heteroaromatic carboxylic acids; Mathematical analysis; Melting; Naphthoic acids; Phase equilibria; Sublimation; Enthalpy of sublimation; Benzoic acid derivatives; Naphthoic acids; Heteroaromatic carboxylic acids; Enthalpy of fusion
• ISSN: 0378-3812; 1879-0224
• DOI: 10.1016/j.fluid.2016.09.016

In this work a method of estimation of sublimation enthalpies of benzoic acid derivatives and aromatic or heteroaromatic carboxylic acids was developed. The method is based on calculation of sublimation enthalpy from fusion enthalpy of studied compound and of benzoic acid at corresponding melting temperatures and sublimation enthalpy of benzoic acid at 298.15 K.
Calculated sublimation enthalpy values of benzoic acid derivatives containing CH3-, CH3O-, F-, Cl-, Br-, I-, NO2- and other substituents, 1- and 2-naphthoic acids and heteroaromatic carboxylic acids (38 compounds in total) were compared with literature data (at 298.15 K) obtained by conventional methods. In most cases, divergence does not exceed 2–3%.
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•Method of estimation of sublimation enthalpy of benzoic acid derivatives was developed.•Sublimation enthalpies of 38 benzoic acid derivatives were calculated from the fusion enthalpies.•Obtained sublimation enthalpies are in good agreement with the literature data.