Thermophysical Study of Several Barbituric Acid Derivatives by Differential Scanning Calorimetry (DSC)

descriptionPublicationkeyboard_double_arrow_right Article 22 Dec 2010 English Publisher:American Chemical Society (ACS)Journal:Journal of Chemical & Engineering Data, volume 56, pages 263-268 (issn: 0021-9568, eissn: 1520-5134,

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Authors: Temprado, Manuel; Roux, María Victoria; Ros Cebriá, Francisco; Notario, Rafael; Segura, Marta; Chickos, James S.;

doi: 10.1021/je1008944

handle: 10261/271805

Thermophysical Study of Several Barbituric Acid Derivatives by Differential Scanning Calorimetry (DSC)

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Abstract

The present study reports a differential scanning calorimetry (DSC) study of the barbituric acid derivatives: 1,3-dimethylbarbituric acid [CAS 769-42-6], 5,5-dimethylbarbituric acid [CAS 24448-94-0], 1,3-diethylbarbituric acid [CAS 32479-73-5], 1,3,5-trimethylbarbituric acid [CAS 7358-61-4], 1,5,5-trimethylbarbituric acid [CAS 702-47-6], and tetramethylbarbituric acid [CAS 13566-66-0] in the temperature interval from T = 268 K to their respective melting temperatures. Temperatures, enthalpies and entropies of fusion, and the heat capacities of the solid compounds as a function of temperature are reported.

The support of the Spanish Ministry of Science and Innovation under Project CTQ2007-60895/BQU is gratefully acknowledged. M.T. acknowledges the Spanish Ministry of Science and Innovation for a “Juan de la Cierva” contract.

Related Organizations

Spanish National Research Council
Spain
University of Missouri–St. Louis
United States
Institute of Physical Chemistry "Rocasolano"
Spain

Keywords

Heat capacity, Differential scanning calorimetry, Phase transitions, Entropy, Reaction products

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