Enthalpy of sublimation/vaporization of trans-cyclohexyl-1,4-diamine and cis-cy...

• Author(s): Tomé, Luciana I. N. ; Rosado, Mário T. S. ; Nunes, Sandra C. C. ; Maria, Teresa M. R. ; Canotilho, João ; Eusébio, M. Ermelinda S.
• Date: 2007
• Persistent ID: http://hdl.handle.net/10316/5035
• Origin: Estudo Geral - Universidade de Coimbra
• Subject(s): trans-Cyclohexyl-1,4-diamine; cis-Cyclohexyl-1,2-diamine; Sublimation/vaporization; Cyclohexyldiamines
• Document Type: Article
• Language: English

Description

The molar enthalpy of sublimation, , of trans-cyclohexyl-1,4-diamine and the molar enthalpy of vaporization, , of cis-cyclohexyl-1,2-diamine, at the temperature 298.15 K, were determined by calorimetry. was obtained for the trans-isomer and for the cis form. The molar enthalpy of fusion of the first compound, at T = 342.1 K, was determined by differential scanning calorimetry. The molar enthalpy of vaporization of the 1,4-isomer was estimated by combining the value of the enthalpy of sublimation with that of the enthalpy of fusion. http://www.sciencedirect.com/science/article/B6WHM-4P47GNP-4/1/c501bd0ecaf08176b8a4d97c7fd89292