Thermal and Volumetric Properties of Five Lactones at Infinite Dilution in Water

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F19%3A43917992" target="_blank" >RIV/60461373:22340/19:43917992 - isvavai.cz</a>

Result on the web

<a href="https://pubs.acs.org/doi/10.1021/acs.jced.8b01146" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.jced.8b01146</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jced.8b01146" target="_blank" >10.1021/acs.jced.8b01146</a>

Result language

angličtina

Original language name

Thermal and Volumetric Properties of Five Lactones at Infinite Dilution in Water

Original language description

Mixing enthalpies and densities of highly dilute aqueous solutions of five lactones (namely γ-butyrolactone (GBL), γ-valerolactone (GVL), α-angelica lactone (AAL), γ-hexalactone (GHL), and δ-hexalactone (DHL)) were measured as a function of solution composition at several temperatures in the range from (288.15 to 318.15) K using a tandem flow arrangement of isothermal mixing microcalorimeter and vibrating-tube densimeter. The densities of the neat lactones were measured, also. The dissolution of the lactones in water was found to be exothermic (except for AAL at higher temperatures) and accompanied by volume contraction. On the basis of these systematic measurements, reliable values of partial molar excess enthalpy, partial molar volume, and partial molar excess volume of the studied solutes at infinite dilution in water were determined. Precision of our measurements allowed us to evaluate with a good accuracy also respective temperature derivative properties, that is, infinite dilution partial molar excess heat capacity, expansion, and excess expansion. The observed thermodynamic behavior was shown to be governed by hydrogen bonding of water molecules to the oxygen atoms of the lactone group. Several structural effects like those of the alkylation of lactone ring, its enlargement, the introduction of the double bond, and the lactone molecular volume on the determined properties were identified and rationalized on the molecular level. © 2019 American Chemical Society.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Chemical Engineering Data

ISSN

0021-9568

e-ISSN

—

Volume of the periodical

64

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

1577-1585

UT code for WoS article

000464768500027

EID of the result in the Scopus database

2-s2.0-85063492719