Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/23424
Type: Artigo de periódico
Title: Estimativa por DSC das entalpias de sublimação da etilenouréia e da propilenouréia: algumas correlações empíricas envolvendo amidas e tioamidas
Title Alternative: Estimative by DSC data of the sublimation enthalpies for ethyleneurea and propyleneurea: some empirical correlations with amides and tioamides
Author: Farias, Robson Fernandes de
Abstract: By using DSC data, the enthaplies of sublimation for ethyleneurea and propyleneurea, are calculated as 84 and 89 kJ mol-1 respectively. Using the vaporization enthalpy values for dimethylethyleneurea and dimethylprophyleneurea, as obtained from literature, the empirical relation: Dcrg Hmo (1)/ Dcrg Hmo (2) = Dlg Hmo (1)/ Dlg Hmo(2) = constant, that relate sublimation or vaporization enthalpies of two different substances and of its methylated derivatives, is obtained. Correlations like that are found to another ureas and thioureas.
Subject: amides
sublimation enthalpy
vaporization enthalpy
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40421999000400008
Address: http://dx.doi.org/10.1590/S0100-40421999000400008
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421999000400008
Date Issue: 1-Jul-1999
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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